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Number

361

  • Positive
  • Odd
  • Composite
  • Perfect square
  • 3 digits

361 is an odd 3-digit integer and a composite number. It has 3 divisors and a digital root of 1.

Number properties

ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value361
Digit count3
Digit sum10
Digital root1repeated digit sum
PalindromicNoreads differently backwards
Perfect squareYes, 19²
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation19^2
Distinct prime factors119
Number of divisors3
Sum of divisors σ(n)381
Aliquot sum20sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)342integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 19, 3613 in total

Arithmetic

Previous number360
Next number362
Double722
Half180.5
Square130,321
Cube47,045,881
Square root19exact
Cube root7.120367359≈
Negation-361
Reciprocal0.0027700831≈
361 factorial1437923258884890654832362511499863354754… (769 digits)

Representations

Decimal361
Binary1011010019 bits
Octal551
Hexadecimal169
Base 36A1
Roman numeralCCCLXI
In wordsthree hundred and sixty-one
Ordinalthree hundred and sixty-first
Scientific notation3.61 × 10^2
Engineering notation361

Nearest landmarks

Next prime367+6
Previous prime359−2
Distance to nearest prime2
Nearest square below361
Nearest square above400

Powers & multiples

361 to the power 2130,321
361 to the power 347,045,881
361 to the power 416,983,563,041
361 to the power 56,131,066,257,801
First ten multiples361, 722, 1,083, 1,444, 1,805, 2,166, 2,527, 2,888, 3,249, 3,610
Powers of twoBetween 2^8 (256) and 2^9 (512)

Divisibility tests

Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 1
Divisible by 5No, remainder 1
Divisible by 6No, remainder 1
Divisible by 7No, remainder 4
Divisible by 8No, remainder 1
Divisible by 9No, remainder 1
Divisible by 10No, remainder 1
Divisible by 11No, remainder 9
Divisible by 12No, remainder 1
Divisible by 100No, remainder 61

Collatz (3n + 1) trajectory

Steps to reach 145the total stopping time
Highest value reached2,7527× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps361 → 1,084 → 542 → 271 → 814 → 407 → 1,222 → 611 → 1,834 → 917 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage36,100%
361% as a decimal3.61
361% of 100361
361% of 1,0003,610
As a fraction of 100361/100

Read another way

As seconds6 minutes and 1 second
As bytes361 B
As a 24-bit colour#000169

Keep nerding

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Neighbouring numbers

Nearby primes

Also reads as

#336611 (colour)

  • #336611
  • Green
  • Dark
  • Nearest: Dark green

#336611 is a green with RGB values 51, 102, 17 and HSL 96°, 71%, 23%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Dark green.

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Colour values

#336611#336611
HEX#336611
HEX (short)#361
RGBrgb(51, 102, 17)
RGB (0–1)0.2, 0.4, 0.0667
RGB percentages20%, 40%, 6.7%
HSLhsl(96, 71.4%, 23.3%)
HSV / HSBhsv(96, 83.3%, 40%)
CMYK50%, 0%, 83.3%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,368,465
CSS custom property--colour: #336611;

Brightness & contrast

Relative luminance0.10247WCAG 2.x, 0 is black and 1 is white
Perceived brightness83.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.89:1
Contrast with white6.89:1WCAG normal text: AA
Contrast with black3.05:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#CC99EE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6A5D00no red cones; affects about 1% of men; ΔE 29.6 from the original
Deuteranopia#63591Bno green cones; the most common form, about 1% of men; ΔE 28.8 from the original
Tritanopia#316256no blue cones; rare, and affects men and women equally; ΔE 39.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.89:1WCAG large text: AAA
Contrast with black, large text3.05:1WCAG large text: AA

Named colours

Dark green · ΔE 11.4Dark olivegreen · ΔE 16.7Olivedrab · ΔE 19.9Forest green · ΔE 21.8Green · ΔE 23.3Sea green · ΔE 24.4
Nearest named CSS colourDark green (#006400)ΔE 11.36, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#441166
Analogous#5D6611, #11661A
Triadic#113366, #661133
Split complementary#191166, #66115E
Tetradic#115D66, #441166, #661A11

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#94E45F
Lighter +30%#77DD33
Lighter +20%#5FBD20
Lighter +10%#499218
Darker −10%#1D3A0A
Darker −20%#070F02
Darker −30%#000000
Darker −40%#000000
More saturated +25%#307502
Less saturated −25%#365720

Channel breakdown

R51
G102
B17
Red51 (20%)
Green102 (40%)
Blue17 (6.7%)
Hue96°
Saturation (HSL)71.43%
Lightness23.33%
Dominant channelGreen
Hex per channelR 33 · G 66 · B 11

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Every value on this page was computed from “361” by Nerdulator’s number engine. Nothing here was retrieved from a database of answers or written by a model.