Number
133,131
- Positive
- Odd
- Composite
- 6 digits
133,131 is an odd 6-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 value133,131
Digit count6
Digit sum12
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation3 × 199 × 223
Distinct prime factors33, 199, 223
Number of divisors8
Sum of divisors σ(n)179,200
Aliquot sum46,069sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)87,912integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 3, 199, 223, 597, 669, 44,377, 133,1318 in total
Arithmetic
Representations
Decimal133,131
Binary10000010000000101118 bits
Octal404013
Hexadecimal2080B
Base 362UQ3
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsone hundred and thirty-three thousand, one hundred and thirty-one
Ordinalone hundred and thirty-three thousand, one hundred and thirty-first
Scientific notation1.33131 × 10^5
Engineering notation133.131 × 10^3
Nearest landmarks
Powers & multiples
133,131 to the power 217,723,863,161
133,131 to the power 32,359,595,626,487,091
133,131 to the power 4314,135,325,349,852,911,921
133,131 to the power 541,821,149,999,151,268,016,954,651
First ten multiples133,131, 266,262, 399,393, 532,524, 665,655, 798,786, 931,917, 1,065,048, 1,198,179, 1,331,310
Powers of twoBetween 2^17 (131,072) and 2^18 (262,144)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 3
Divisible by 5No, remainder 1
Divisible by 6No, remainder 3
Divisible by 7No, remainder 5
Divisible by 8No, remainder 3
Divisible by 9No, remainder 3
Divisible by 10No, remainder 1
Divisible by 11No, remainder 9
Divisible by 12No, remainder 3
Divisible by 100No, remainder 31
Collatz (3n + 1) trajectory
Steps to reach 156the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps133,131 → 399,394 → 199,697 → 599,092 → 299,546 → 149,773 → 449,320 → 224,660 → 112,330 → 56,165 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage13,313,100%
133,131% as a decimal1,331.31
133,131% of 100133,131
133,131% of 1,0001,331,310
As a fraction of 100133,131/100
Read another way
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Derived from 133,131
Also reads as
#133131 (colour)
- #133131
- Cyan
- Dark
- Nearest: Dark slate grey
#133131 is a cyan with RGB values 19, 49, 49 and HSL 180°, 44%, 13%. It is a dark colour, so white text on it reaches 13.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.
Colour values
#133131#133131
HEX#133131
RGBrgb(19, 49, 49)
RGB (0–1)0.0745, 0.1922, 0.1922
RGB percentages7.5%, 19.2%, 19.2%
HSLhsl(180, 44.1%, 13.3%)
HSV / HSBhsv(180, 61.2%, 19.2%)
CMYK61.2%, 0%, 0%, 80.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,257,777
CSS custom property--colour: #133131;
Brightness & contrast
Relative luminance0.02557WCAG 2.x, 0 is black and 1 is white
Perceived brightness42.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.89:1
Contrast with white13.89:1WCAG normal text: AAA
Contrast with black1.51:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#ECCECE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.89:1WCAG large text: AAA
Contrast with black, large text1.51:1WCAG large text: Fail
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#311313
Analogous#133122, #132231
Triadic#311331, #313113
Split complementary#311322, #312213
Tetradic#221331, #311313, #223113
Tints, shades & saturation
Channel breakdown
R19
G49
B49
Red19 (7.5%)
Green49 (19.2%)
Blue49 (19.2%)
Hue180°
Saturation (HSL)44.12%
Lightness13.33%
Dominant channelGreen and Blue
Hex per channelR 13 · G 31 · B 31
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