Number
571
- Positive
- Odd
- Prime
- 3 digits
571 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 value571
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 factorisation571
Distinct prime factors1571
Number of divisors2
Sum of divisors σ(n)572
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)570integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 5712 in total
Arithmetic
Representations
Decimal571
Binary100011101110 bits
Octal1073
Hexadecimal23B
Base 36FV
Roman numeralDLXXI
In wordsfive hundred and seventy-one
Ordinalfive hundred and seventy-first
Scientific notation5.71 × 10^2
Engineering notation571
Nearest landmarks
Powers & multiples
571 to the power 2326,041
571 to the power 3186,169,411
571 to the power 4106,302,733,681
571 to the power 560,698,860,931,851
First ten multiples571, 1,142, 1,713, 2,284, 2,855, 3,426, 3,997, 4,568, 5,139, 5,710
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 1
Divisible by 6No, remainder 1
Divisible by 7No, remainder 4
Divisible by 8No, remainder 3
Divisible by 9No, remainder 4
Divisible by 10No, remainder 1
Divisible by 11No, remainder 10
Divisible by 12No, remainder 7
Divisible by 100No, remainder 71
Collatz (3n + 1) trajectory
Steps to reach 130the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps571 → 1,714 → 857 → 2,572 → 1,286 → 643 → 1,930 → 965 → 2,896 → 1,448 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage57,100%
571% as a decimal5.71
571% of 100571
571% of 1,0005,710
As a fraction of 100571/100
Read another way
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Derived from 571
Other readings
Also reads as
#557711 (colour)
- #557711
- Green
- Dark
- Nearest: Olivedrab
#557711 is a green with RGB values 85, 119, 17 and HSL 80°, 75%, 27%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Olivedrab.
Colour values
#557711#557711
HEX#557711
HEX (short)#571
RGBrgb(85, 119, 17)
RGB (0–1)0.3333, 0.4667, 0.0667
RGB percentages33.3%, 46.7%, 6.7%
HSLhsl(80, 75%, 26.7%)
HSV / HSBhsv(80, 85.7%, 46.7%)
CMYK28.6%, 0%, 85.7%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,601,041
CSS custom property--colour: #557711;
Brightness & contrast
Relative luminance0.15165WCAG 2.x, 0 is black and 1 is white
Perceived brightness102.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.21:1
Contrast with white5.21:1WCAG normal text: AA
Contrast with black4.03:1WCAG normal text: Fail
Greyscale equivalent#686868
Inverted#AA88EE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.21:1WCAG large text: AAA
Contrast with black, large text4.03:1WCAG large text: AA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#331177
Analogous#776611, #227711
Triadic#115577, #771155
Split complementary#112277, #661177
Tetradic#117766, #331177, #771122
Tints, shades & saturation
Channel breakdown
R85
G119
B17
Red85 (33.3%)
Green119 (46.7%)
Blue17 (6.7%)
Hue80°
Saturation (HSL)75%
Lightness26.67%
Dominant channelGreen
Hex per channelR 55 · G 77 · B 11
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Harmonies
Similar named colours
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