Number
113
- Positive
- Odd
- Prime
- 3 digits
113 is an odd 3-digit integer and a prime number. It has 2 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value113
Digit count3
Digit sum5
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation113
Distinct prime factors1113
Number of divisors2
Sum of divisors σ(n)114
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)112integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 1132 in total
Arithmetic
Representations
Decimal113
Binary11100017 bits
Octal161
Hexadecimal71
Base 3635
Roman numeralCXIII
In wordsone hundred and thirteen
Ordinalone hundred and thirteenth
Scientific notation1.13 × 10^2
Engineering notation113
Nearest landmarks
Powers & multiples
113 to the power 212,769
113 to the power 31,442,897
113 to the power 4163,047,361
113 to the power 518,424,351,793
First ten multiples113, 226, 339, 452, 565, 678, 791, 904, 1,017, 1,130
Powers of twoBetween 2^6 (64) and 2^7 (128)
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 1
Divisible by 9No, remainder 5
Divisible by 10No, remainder 3
Divisible by 11No, remainder 3
Divisible by 12No, remainder 5
Divisible by 100No, remainder 13
Collatz (3n + 1) trajectory
Steps to reach 112the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps113 → 340 → 170 → 85 → 256 → 128 → 64 → 32 → 16 → 8 → …
Last steps… → 32 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage11,300%
113% as a decimal1.13
113% of 100113
113% of 1,0001,130
As a fraction of 100113/100
Read another way
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Derived from 113
Other readings
Also reads as
#111133 (colour)
- #111133
- Blue
- Dark
- Nearest: Black
#111133 is a blue with RGB values 17, 17, 51 and HSL 240°, 50%, 13%. It is a dark colour, so white text on it reaches 18.2:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#111133#111133
HEX#111133
HEX (short)#113
RGBrgb(17, 17, 51)
RGB (0–1)0.0667, 0.0667, 0.2
RGB percentages6.7%, 6.7%, 20%
HSLhsl(240, 50%, 13.3%)
HSV / HSBhsv(240, 66.7%, 20%)
CMYK66.7%, 66.7%, 0%, 80%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,118,515
CSS custom property--colour: #111133;
Brightness & contrast
Relative luminance0.00759WCAG 2.x, 0 is black and 1 is white
Perceived brightness23.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.23:1
Contrast with white18.23:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#EEEECC
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.23:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#333311
Analogous#112233, #221133
Triadic#331111, #113311
Split complementary#332211, #223311
Tetradic#331122, #333311, #113322
Tints, shades & saturation
Channel breakdown
R17
G17
B51
Red17 (6.7%)
Green17 (6.7%)
Blue51 (20%)
Hue240°
Saturation (HSL)50%
Lightness13.33%
Dominant channelBlue
Hex per channelR 11 · G 11 · B 33
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Harmonies
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