Number
530
- Positive
- Even
- Composite
- 3 digits
530 is an even 3-digit integer and a composite number. It has 8 divisors and a digital root of 8.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value530
Digit count3
Digit sum8
Digital root8repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation2 × 5 × 53
Distinct prime factors32, 5, 53
Number of divisors8
Sum of divisors σ(n)972
Aliquot sum442sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)208integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 2, 5, 10, 53, 106, 265, 5308 in total
Arithmetic
Representations
Decimal530
Binary100001001010 bits
Octal1022
Hexadecimal212
Base 36EQ
Roman numeralDXXX
In wordsfive hundred and thirty
Ordinalfive hundred and thirtieth
Scientific notation5.3 × 10^2
Engineering notation530
Nearest landmarks
Powers & multiples
530 to the power 2280,900
530 to the power 3148,877,000
530 to the power 478,904,810,000
530 to the power 541,819,549,300,000
First ten multiples530, 1,060, 1,590, 2,120, 2,650, 3,180, 3,710, 4,240, 4,770, 5,300
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4No, remainder 2
Divisible by 5Yes
Divisible by 6No, remainder 2
Divisible by 7No, remainder 5
Divisible by 8No, remainder 2
Divisible by 9No, remainder 8
Divisible by 10Yes
Divisible by 11No, remainder 2
Divisible by 12No, remainder 2
Divisible by 100No, remainder 30
Collatz (3n + 1) trajectory
Steps to reach 1123the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps530 → 265 → 796 → 398 → 199 → 598 → 299 → 898 → 449 → 1,348 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage53,000%
530% as a decimal5.3
530% of 100530
530% of 1,0005,300
As a fraction of 100530/100
Read another way
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Derived from 530
Other readings
Also reads as
#553300 (colour)
- #553300
- Orange
- Dark
- Nearest: Saddle brown
#553300 is a orange with RGB values 85, 51, 0 and HSL 36°, 100%, 17%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Saddle brown.
Colour values
#553300#553300
HEX#553300
HEX (short)#530
RGBrgb(85, 51, 0)
RGB (0–1)0.3333, 0.2, 0
RGB percentages33.3%, 20%, 0%
HSLhsl(36, 100%, 16.7%)
HSV / HSBhsv(36, 100%, 33.3%)
CMYK0%, 40%, 100%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,583,616
CSS custom property--colour: #553300;
Brightness & contrast
Relative luminance0.04299WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.29:1
Contrast with white11.29:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#AACCFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.29:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#002255
Analogous#550800, #4C5500
Triadic#005533, #330055
Split complementary#004C55, #080055
Tetradic#005509, #002255, #55004D
Tints, shades & saturation
Channel breakdown
R85
G51
B0
Red85 (33.3%)
Green51 (20%)
Blue0 (0%)
Hue36°
Saturation (HSL)100%
Lightness16.67%
Dominant channelRed
Hex per channelR 55 · G 33 · B 00
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Harmonies
Similar named colours
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