Number
131,431
- Positive
- Odd
- Prime
- 6 digits
131,431 is an odd 6-digit integer and a prime number. It has 2 divisors and a digital root of 4.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value131,431
Digit count6
Digit sum13
Digital root4repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation131,431
Distinct prime factors1131,431
Number of divisors2
Sum of divisors σ(n)131,432
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)131,430integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 131,4312 in total
Arithmetic
Representations
Decimal131,431
Binary10000000010110011118 bits
Octal400547
Hexadecimal20167
Base 362TEV
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsone hundred and thirty-one thousand, four hundred and thirty-one
Ordinalone hundred and thirty-one thousand, four hundred and thirty-first
Scientific notation1.31431 × 10^5
Engineering notation131.431 × 10^3
Nearest landmarks
Powers & multiples
131,431 to the power 217,274,107,761
131,431 to the power 32,270,353,257,135,991
131,431 to the power 4298,394,798,938,640,433,121
131,431 to the power 539,218,326,819,304,450,765,526,151
First ten multiples131,431, 262,862, 394,293, 525,724, 657,155, 788,586, 920,017, 1,051,448, 1,182,879, 1,314,310
Powers of twoBetween 2^17 (131,072) and 2^18 (262,144)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 1
Divisible by 6No, remainder 1
Divisible by 7No, remainder 6
Divisible by 8No, remainder 7
Divisible by 9No, remainder 4
Divisible by 10No, remainder 1
Divisible by 11No, remainder 3
Divisible by 12No, remainder 7
Divisible by 100No, remainder 31
Collatz (3n + 1) trajectory
Steps to reach 1100the total stopping time
Highest value reached3,368,46425× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps131,431 → 394,294 → 197,147 → 591,442 → 295,721 → 887,164 → 443,582 → 221,791 → 665,374 → 332,687 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage13,143,100%
131,431% as a decimal1,314.31
131,431% of 100131,431
131,431% of 1,0001,314,310
As a fraction of 100131,431/100
Read another way
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Derived from 131,431
Also reads as
#131431 (colour)
- #131431
- Blue
- Dark
- Nearest: Black
#131431 is a blue with RGB values 19, 20, 49 and HSL 238°, 44%, 13%. It is a dark colour, so white text on it reaches 17.9:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#131431#131431
HEX#131431
RGBrgb(19, 20, 49)
RGB (0–1)0.0745, 0.0784, 0.1922
RGB percentages7.5%, 7.8%, 19.2%
HSLhsl(238, 44.1%, 13.3%)
HSV / HSBhsv(238, 61.2%, 19.2%)
CMYK61.2%, 59.2%, 0%, 80.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,250,353
CSS custom property--colour: #131431;
Brightness & contrast
Relative luminance0.00861WCAG 2.x, 0 is black and 1 is white
Perceived brightness24.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.92:1
Contrast with white17.92:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#161616
Inverted#ECEBCE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.92:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#313013
Analogous#132331, #211331
Triadic#311314, #143113
Split complementary#312113, #233113
Tetradic#311323, #313013, #133121
Tints, shades & saturation
Channel breakdown
R19
G20
B49
Red19 (7.5%)
Green20 (7.8%)
Blue49 (19.2%)
Hue238°
Saturation (HSL)44.12%
Lightness13.33%
Dominant channelBlue
Hex per channelR 13 · G 14 · B 31
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Harmonies
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