Recognised as Number
3,550
- Positive
- Even
- Composite
- 4 digits
3,550 is an even 4-digit integer and a composite number. It has 12 divisors and a digital root of 4.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value3,550
Digit count4
Digit sum13
Digit product0zero, because one of the digits is zero
Multiplicative persistence1times the digit product can be taken before one digit is left
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5^2 × 71
Distinct prime factors32, 5, 71
Number of divisors12
Sum of divisors σ(n)6,696
Aliquot sum3,146sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)1,400integers below n that share no factor with it
Carmichael function λ(n)140the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 1,400
Möbius function μ(n)0zero, because a prime divides n twice
SquarefreeNohas a repeated prime factor
All divisors1, 2, 5, 10, 25, 50, 71, 142, 355, 710, 1,775, 3,55012 in total
Arithmetic
Previous number3,549
Next number3,551
Double7,100
Half1,775
Square12,602,500
Cube44,738,875,000
Square root59.581876439≈irrational, shown to 9 decimal places
Cube root15.254903019≈
Negation-3,550
Reciprocal0.0002816901≈
Representations
Decimal3,550
Binary11011101111012 bits
Octal6736
HexadecimalDDE
Base 362QM
Roman numeralMMMDL
In wordsthree thousand, five hundred and fifty
Ordinalthree thousand, five hundred and fiftieth
Scientific notation3.55 × 10^3
Engineering notation3.55 × 10^3
In other bases
Ternary11212111base 3; the most digit-efficient integer base after e: 8 digits
Quinary103200base 5; one hand: 6 digits
Septenary13231base 7: 5 digits
Nonary4774base 9; each digit is two ternary digits: 4 digits
Duodecimal207abase 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 4 digits
Vigesimal8habase 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal59:10base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary1TT0TT111digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary1001000100010base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000110111011110
Bit length12 bitsto write the magnitude
Set bits9the population count, or Hamming weight
Zero bits3within that length
Bit parityodd9 set bits, so odd; not the same as the number itself being even
Highest set bitbit 11worth 2,048
Lowest set bitbit 11 trailing zero
Power of twoNo
Bytes20d de
Gray code101100110001n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000110111011110
32-bit00000000000000000000110111011110
64-bit0000000000000000000000000000000000000000000000000000110111011110
One's complement1111001000100001at 16 bits, every bit flipped
Bits reversed0111101110110000at 16 bits
Rotated left by 10001101110111100at 16 bits, wrapping
Shifted left by 11101110111100= 7,100, no wrap
Shifted right by 111011101111= 1,775, discarding the low bit
These bits as a double1.75393304 × 10^-320≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
3,550 to the power 212,602,500
3,550 to the power 344,738,875,000
3,550 to the power 4158,823,006,250,000
3,550 to the power 5563,821,672,187,500,000
First ten multiples3,550, 7,100, 10,650, 14,200, 17,750, 21,300, 24,850, 28,400, 31,950, 35,500
Powers of twoBetween 2^11 (2,048) and 2^12 (4,096)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 1
Divisible by 8No, remainder 6
Divisible by 9No, remainder 4
Divisible by 10Yes
Divisible by 11No, remainder 8
Divisible by 12No, remainder 10
Divisible by 100No, remainder 50
Collatz (3n + 1) trajectory
Steps to reach 187the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps3,550 → 1,775 → 5,326 → 2,663 → 7,990 → 3,995 → 11,986 → 5,993 → 17,980 → 8,990 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage355,000%
3,550% as a decimal35.5
3,550% of 1003,550
3,550% of 1,00035,500
As a fraction of 1003,550/100
Read another way
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Derived from 3,550
Also reads as
3550 (year)
- Common year
- 365 days
- 36th century
- Horse
3550 will be a common year of 365 days. It begins on a Sunday and ends on a Sunday. Easter Sunday falls on 2 April.
Structure of the year
Patterns forced by the calendar
Weekday counts52 of each, plus an extra Sunday365 days is 52 weeks and 1 day, and the remainder starts on the weekday 1 January falls on
Sundays53one of the extras
Mondays52
Tuesdays52
Wednesdays52
Thursdays52
Fridays52
Saturdays52
Friday the 13th2 of them13 January, 13 October
ISO weeks52an ordinary 52-week year
Same calendar as3539the most recent year whose calendar is identical, so a printed one could be reused
Calendar repeats in3561, 3567, 357811 years later, then again after that; the gap is 6, 11 or 28 years, broken by centuries that skip a leap year
Months of 3550
January31 days, starts Sunday
February28 days, starts Wednesday
August31 days, starts Tuesday
September30 days, starts Friday
October31 days, starts Sunday
November30 days, starts Wednesday
December31 days, starts Friday
Time references
These values depend on today’s date and change daily.
Unix timestamp at the start49,859,971,200
Unix timestamp at the end49,891,507,199
Years from now1,524 years from now
Days from today556,373 days to 1 January
The number 3550
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Also reads as
#335555 (colour)
- #335555
- Cyan
- Dark
- Nearest: Dark slate grey
#335555 is a cyan with RGB values 51, 85, 85 and HSL 180°, 25%, 27%. It is a dark colour, so white text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#335555#335555
HEX#335555
HEX (short)#355
RGBrgb(51, 85, 85)
RGB (0–1)0.2, 0.3333, 0.3333
RGB percentages20%, 33.3%, 33.3%
HSLhsl(180, 25%, 26.7%)
HSV / HSBhsv(180, 40%, 33.3%)
CMYK40%, 0%, 0%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,364,181
CSS custom property--colour: #335555;
Brightness & contrast
Relative luminance0.07857WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.17:1
Contrast with white8.17:1WCAG normal text: AAA
Contrast with black2.57:1WCAG normal text: Fail
Greyscale equivalent#4E4E4E
Inverted#CCAAAA
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.17:1WCAG large text: AAA
Contrast with black, large text2.57:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#553333
Analogous#335544, #334455
Triadic#553355, #555533
Split complementary#553344, #554433
Tetradic#443355, #553333, #445533
Tints, shades & saturation
Channel breakdown
R51
G85
B85
Red51 (20%)
Green85 (33.3%)
Blue85 (33.3%)
Hue180°
Saturation (HSL)25%
Lightness26.67%
Dominant channelGreen and Blue
Hex per channelR 33 · G 55 · B 55
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Harmonies
Similar named colours
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