Number
259
- Positive
- Odd
- Composite
- 3 digits
259 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 7.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value259
Digit count3
Digit sum16
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation7 × 37
Distinct prime factors27, 37
Number of divisors4
Sum of divisors σ(n)304
Aliquot sum45sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)216integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 7, 37, 2594 in total
Arithmetic
Representations
Decimal259
Binary1000000119 bits
Octal403
Hexadecimal103
Base 3677
Roman numeralCCLIX
In wordstwo hundred and fifty-nine
Ordinaltwo hundred and fifty-ninth
Scientific notation2.59 × 10^2
Engineering notation259
Nearest landmarks
Powers & multiples
259 to the power 267,081
259 to the power 317,373,979
259 to the power 44,499,860,561
259 to the power 51,165,463,885,299
First ten multiples259, 518, 777, 1,036, 1,295, 1,554, 1,813, 2,072, 2,331, 2,590
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 3
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7Yes
Divisible by 8No, remainder 3
Divisible by 9No, remainder 7
Divisible by 10No, remainder 9
Divisible by 11No, remainder 6
Divisible by 12No, remainder 7
Divisible by 100No, remainder 59
Collatz (3n + 1) trajectory
Steps to reach 1122the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps259 → 778 → 389 → 1,168 → 584 → 292 → 146 → 73 → 220 → 110 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage25,900%
259% as a decimal2.59
259% of 100259
259% of 1,0002,590
As a fraction of 100259/100
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Derived from 259
Other readings
Also reads as
#225599 (colour)
- #225599
- Blue
- Dark
- Nearest: Dark slateblue
#225599 is a blue with RGB values 34, 85, 153 and HSL 214°, 64%, 37%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.
Colour values
#225599#225599
HEX#225599
HEX (short)#259
RGBrgb(34, 85, 153)
RGB (0–1)0.1333, 0.3333, 0.6
RGB percentages13.3%, 33.3%, 60%
HSLhsl(214.3, 63.6%, 36.7%)
HSV / HSBhsv(214.3, 77.8%, 60%)
CMYK77.8%, 44.4%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,250,137
CSS custom property--colour: #225599;
Brightness & contrast
Relative luminance0.09137WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.43:1
Contrast with white7.43:1WCAG normal text: AAA
Contrast with black2.83:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#DDAA66
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.43:1WCAG large text: AAA
Contrast with black, large text2.83:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#996622
Analogous#229099, #2B2299
Triadic#992255, #559922
Split complementary#992B22, #909922
Tetradic#992290, #996622, #22992B
Tints, shades & saturation
Channel breakdown
R34
G85
B153
Red34 (13.3%)
Green85 (33.3%)
Blue153 (60%)
Hue214.29°
Saturation (HSL)63.64%
Lightness36.67%
Dominant channelBlue
Hex per channelR 22 · G 55 · B 99
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Harmonies
Similar named colours
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