Number
533
- Positive
- Odd
- Composite
- 3 digits
533 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 2.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value533
Digit count3
Digit sum11
Digital root2repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation13 × 41
Distinct prime factors213, 41
Number of divisors4
Sum of divisors σ(n)588
Aliquot sum55sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)480integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 13, 41, 5334 in total
Arithmetic
Representations
Decimal533
Binary100001010110 bits
Octal1025
Hexadecimal215
Base 36ET
Roman numeralDXXXIII
In wordsfive hundred and thirty-three
Ordinalfive hundred and thirty-third
Scientific notation5.33 × 10^2
Engineering notation533
Nearest landmarks
Powers & multiples
533 to the power 2284,089
533 to the power 3151,419,437
533 to the power 480,706,559,921
533 to the power 543,016,596,437,893
First ten multiples533, 1,066, 1,599, 2,132, 2,665, 3,198, 3,731, 4,264, 4,797, 5,330
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 1
Divisible by 5No, remainder 3
Divisible by 6No, remainder 5
Divisible by 7No, remainder 1
Divisible by 8No, remainder 5
Divisible by 9No, remainder 2
Divisible by 10No, remainder 3
Divisible by 11No, remainder 5
Divisible by 12No, remainder 5
Divisible by 100No, remainder 33
Collatz (3n + 1) trajectory
Steps to reach 130the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps533 → 1,600 → 800 → 400 → 200 → 100 → 50 → 25 → 76 → 38 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage53,300%
533% as a decimal5.33
533% of 100533
533% of 1,0005,330
As a fraction of 100533/100
Read another way
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Derived from 533
Other readings
Also reads as
#553333 (colour)
- #553333
- Red
- Dark
- Nearest: Dim grey
#553333 is a red with RGB values 85, 51, 51 and HSL 0°, 25%, 27%. It is a dark colour, so white text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Dim grey.
Colour values
#553333#553333
HEX#553333
HEX (short)#533
RGBrgb(85, 51, 51)
RGB (0–1)0.3333, 0.2, 0.2
RGB percentages33.3%, 20%, 20%
HSLhsl(0, 25%, 26.7%)
HSV / HSBhsv(0, 40%, 33.3%)
CMYK0%, 40%, 40%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,583,667
CSS custom property--colour: #553333;
Brightness & contrast
Relative luminance0.04538WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.01:1
Contrast with white11.01:1WCAG normal text: AAA
Contrast with black1.91:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#AACCCC
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.01:1WCAG large text: AAA
Contrast with black, large text1.91:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#335555
Analogous#553344, #554433
Triadic#335533, #333355
Split complementary#335544, #334455
Tetradic#445533, #335555, #443355
Tints, shades & saturation
Channel breakdown
R85
G51
B51
Red85 (33.3%)
Green51 (20%)
Blue51 (20%)
Hue0°
Saturation (HSL)25%
Lightness26.67%
Dominant channelRed
Hex per channelR 55 · G 33 · B 33
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