Number
229
- Positive
- Odd
- Prime
- 3 digits
229 is an odd 3-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 value229
Digit count3
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 factorisation229
Distinct prime factors1229
Number of divisors2
Sum of divisors σ(n)230
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)228integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2292 in total
Arithmetic
Representations
Decimal229
Binary111001018 bits
Octal345
HexadecimalE5
Base 366D
Roman numeralCCXXIX
In wordstwo hundred and twenty-nine
Ordinaltwo hundred and twenty-ninth
Scientific notation2.29 × 10^2
Engineering notation229
Nearest landmarks
Powers & multiples
229 to the power 252,441
229 to the power 312,008,989
229 to the power 42,750,058,481
229 to the power 5629,763,392,149
First ten multiples229, 458, 687, 916, 1,145, 1,374, 1,603, 1,832, 2,061, 2,290
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 1
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7No, remainder 5
Divisible by 8No, remainder 5
Divisible by 9No, remainder 4
Divisible by 10No, remainder 9
Divisible by 11No, remainder 9
Divisible by 12No, remainder 1
Divisible by 100No, remainder 29
Collatz (3n + 1) trajectory
Steps to reach 134the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps229 → 688 → 344 → 172 → 86 → 43 → 130 → 65 → 196 → 98 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage22,900%
229% as a decimal2.29
229% of 100229
229% of 1,0002,290
As a fraction of 100229/100
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Derived from 229
Other readings
Also reads as
#222299 (colour)
- #222299
- Blue
- Dark
- Nearest: Navy
#222299 is a blue with RGB values 34, 34, 153 and HSL 240°, 64%, 37%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Navy.
Colour values
#222299#222299
HEX#222299
HEX (short)#229
RGBrgb(34, 34, 153)
RGB (0–1)0.1333, 0.1333, 0.6
RGB percentages13.3%, 13.3%, 60%
HSLhsl(240, 63.6%, 36.7%)
HSV / HSBhsv(240, 77.8%, 60%)
CMYK77.8%, 77.8%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,237,081
CSS custom property--colour: #222299;
Brightness & contrast
Relative luminance0.03784WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.95:1
Contrast with white11.95:1WCAG normal text: AAA
Contrast with black1.76:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#DDDD66
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.95:1WCAG large text: AAA
Contrast with black, large text1.76:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#999922
Analogous#225E99, #5E2299
Triadic#992222, #229922
Split complementary#995E22, #5E9922
Tetradic#99225E, #999922, #22995E
Tints, shades & saturation
Channel breakdown
R34
G34
B153
Red34 (13.3%)
Green34 (13.3%)
Blue153 (60%)
Hue240°
Saturation (HSL)63.64%
Lightness36.67%
Dominant channelBlue
Hex per channelR 22 · G 22 · B 99
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