Number
250
- Positive
- Even
- Composite
- 3 digits
250 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 7.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value250
Digit count3
Digit sum7
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5^3
Distinct prime factors22, 5
Number of divisors8
Sum of divisors σ(n)468
Aliquot sum218sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)100integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 5, 10, 25, 50, 125, 2508 in total
Arithmetic
Representations
Decimal250
Binary111110108 bits
Octal372
HexadecimalFA
Base 366Y
Roman numeralCCL
In wordstwo hundred and fifty
Ordinaltwo hundred and fiftieth
Scientific notation2.5 × 10^2
Engineering notation250
Nearest landmarks
Powers & multiples
250 to the power 262,500
250 to the power 315,625,000
250 to the power 43,906,250,000
250 to the power 5976,562,500,000
First ten multiples250, 500, 750, 1,000, 1,250, 1,500, 1,750, 2,000, 2,250, 2,500
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 5
Divisible by 8No, remainder 2
Divisible by 9No, remainder 7
Divisible by 10Yes
Divisible by 11No, remainder 8
Divisible by 12No, remainder 10
Divisible by 100No, remainder 50
Collatz (3n + 1) trajectory
Steps to reach 1109the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps250 → 125 → 376 → 188 → 94 → 47 → 142 → 71 → 214 → 107 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage25,000%
250% as a decimal2.5
250% of 100250
250% of 1,0002,500
As a fraction of 100250/100
Read another way
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Derived from 250
Other readings
Also reads as
#225500 (colour)
- #225500
- Green
- Dark
- Nearest: Dark green
#225500 is a green with RGB values 34, 85, 0 and HSL 96°, 100%, 17%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Dark green.
Colour values
#225500#225500
HEX#225500
HEX (short)#250
RGBrgb(34, 85, 0)
RGB (0–1)0.1333, 0.3333, 0
RGB percentages13.3%, 33.3%, 0%
HSLhsl(96, 100%, 16.7%)
HSV / HSBhsv(96, 100%, 33.3%)
CMYK60%, 0%, 100%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,249,984
CSS custom property--colour: #225500;
Brightness & contrast
Relative luminance0.06837WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.87:1
Contrast with white8.87:1WCAG normal text: AAA
Contrast with black2.37:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#DDAAFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.87:1WCAG large text: AAA
Contrast with black, large text2.37:1WCAG large text: Fail
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#330055
Analogous#4C5500, #005509
Triadic#002255, #550022
Split complementary#080055, #55004D
Tetradic#004C55, #330055, #550800
Tints, shades & saturation
Channel breakdown
R34
G85
B0
Red34 (13.3%)
Green85 (33.3%)
Blue0 (0%)
Hue96°
Saturation (HSL)100%
Lightness16.67%
Dominant channelGreen
Hex per channelR 22 · G 55 · B 00
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Harmonies
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