Recognised as Number
273
- Positive
- Odd
- Composite
- 3 digits
273 is an odd 3-digit integer and a composite number. It has 8 divisors and a digital root of 3.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value273
Digit count3
Digit sum12
Digit product42
Multiplicative persistence2times the digit product can be taken before one digit is left
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation3 × 7 × 13
Distinct prime factors33, 7, 13
Number of divisors8
Sum of divisors σ(n)448
Aliquot sum175sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)144integers below n that share no factor with it
Carmichael function λ(n)12the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 144
Möbius function μ(n)−13 distinct prime factors, an odd number of them
SquarefreeYesno repeated prime factor
All divisors1, 3, 7, 13, 21, 39, 91, 2738 in total
Arithmetic
Representations
Decimal273
Binary1000100019 bits
Octal421
Hexadecimal111
Base 367L
Roman numeralCCLXXIII
In wordstwo hundred and seventy-three
Ordinaltwo hundred and seventy-third
Scientific notation2.73 × 10^2
Engineering notation273
In other bases
Ternary101010base 3; the most digit-efficient integer base after e — 6 digits
Quinary2043base 5; one hand — 4 digits
Septenary540base 7 — 3 digits
Nonary333base 9; each digit is two ternary digits — 3 digits
Duodecimal1a9base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves — 3 digits
Vigesimalddbase 20; hands and feet, and the Mayan and Yoruba systems — 2 digits
Sexagesimal4:33base 60; Babylonian, and still how an hour and a circle are divided — 2 digits
Balanced ternary101010digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary100010001base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000000100010001
Bit length9 bitsto write the magnitude
Set bits3the population count, or Hamming weight
Zero bits6within that length
Bit parityodd3 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 8worth 256
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes201 11
Gray code110011001n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000000100010001
32-bit00000000000000000000000100010001
64-bit0000000000000000000000000000000000000000000000000000000100010001
One's complement1111111011101110at 16 bits, every bit flipped
Bits reversed1000100010000000at 16 bits
Rotated left by 10000001000100010at 16 bits, wrapping
Shifted left by 11000100010= 546, no wrap
Shifted right by 110001000= 136, discarding the low bit
These bits as a double1.34879921 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
273 to the power 274,529
273 to the power 320,346,417
273 to the power 45,554,571,841
273 to the power 51,516,398,112,593
First ten multiples273, 546, 819, 1,092, 1,365, 1,638, 1,911, 2,184, 2,457, 2,730
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 1
Divisible by 5No, remainder 3
Divisible by 6No, remainder 3
Divisible by 7Yes
Divisible by 8No, remainder 1
Divisible by 9No, remainder 3
Divisible by 10No, remainder 3
Divisible by 11No, remainder 9
Divisible by 12No, remainder 9
Divisible by 100No, remainder 73
Collatz (3n + 1) trajectory
Steps to reach 129the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps273 → 820 → 410 → 205 → 616 → 308 → 154 → 77 → 232 → 116 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage27,300%
273% as a decimal2.73
273% of 100273
273% of 1,0002,730
As a fraction of 100273/100
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Derived from 273
Other readings
Also reads as
#227733 (colour)
- #227733
- Green
- Dark
- Nearest: Sea green
#227733 is a green with RGB values 34, 119, 51 and HSL 132°, 56%, 30%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Sea green.
Colour values
#227733#227733
HEX#227733
HEX (short)#273
RGBrgb(34, 119, 51)
RGB (0–1)0.1333, 0.4667, 0.2
RGB percentages13.3%, 46.7%, 20%
HSLhsl(132, 55.6%, 30%)
HSV / HSBhsv(132, 71.4%, 46.7%)
CMYK71.4%, 0%, 57.1%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,258,739
CSS custom property--colour: #227733;
Brightness & contrast
Relative luminance0.13773WCAG 2.x, 0 is black and 1 is white
Perceived brightness94.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.59:1
Contrast with white5.59:1WCAG normal text: AA
Contrast with black3.75:1WCAG normal text: Fail
Greyscale equivalent#606060
Inverted#DD88CC
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.59:1WCAG large text: AAA
Contrast with black, large text3.75:1WCAG large text: AA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#772266
Analogous#3C7722, #22775E
Triadic#332277, #773322
Split complementary#5E2277, #77223B
Tetradic#223B77, #772266, #775E22
Tints, shades & saturation
Channel breakdown
R34
G119
B51
Red34 (13.3%)
Green119 (46.7%)
Blue51 (20%)
Hue132°
Saturation (HSL)55.56%
Lightness30%
Dominant channelGreen
Hex per channelR 22 · G 77 · B 33
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Harmonies
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