Number
224
- Positive
- Even
- Composite
- 3 digits
224 is an even 3-digit integer and a composite number. It has 12 divisors and a digital root of 8.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value224
Digit count3
Digit sum8
Digital root8repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^5 × 7
Distinct prime factors22, 7
Number of divisors12
Sum of divisors σ(n)504
Aliquot sum280sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)96integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 22412 in total
Arithmetic
Representations
Decimal224
Binary111000008 bits
Octal340
HexadecimalE0
Base 3668
Roman numeralCCXXIV
In wordstwo hundred and twenty-four
Ordinaltwo hundred and twenty-fourth
Scientific notation2.24 × 10^2
Engineering notation224
Nearest landmarks
Powers & multiples
224 to the power 250,176
224 to the power 311,239,424
224 to the power 42,517,630,976
224 to the power 5563,949,338,624
First ten multiples224, 448, 672, 896, 1,120, 1,344, 1,568, 1,792, 2,016, 2,240
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 2
Divisible by 4Yes
Divisible by 5No, remainder 4
Divisible by 6No, remainder 2
Divisible by 7Yes
Divisible by 8Yes
Divisible by 9No, remainder 8
Divisible by 10No, remainder 4
Divisible by 11No, remainder 4
Divisible by 12No, remainder 8
Divisible by 100No, remainder 24
Collatz (3n + 1) trajectory
Steps to reach 121the total stopping time
Highest value reached224
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps224 → 112 → 56 → 28 → 14 → 7 → 22 → 11 → 34 → 17 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage22,400%
224% as a decimal2.24
224% of 100224
224% of 1,0002,240
As a fraction of 100224/100
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Derived from 224
Other readings
Also reads as
#222244 (colour)
- #222244
- Blue
- Dark
- Nearest: Black
#222244 is a blue with RGB values 34, 34, 68 and HSL 240°, 33%, 20%. It is a dark colour, so white text on it reaches 15.2:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#222244#222244
HEX#222244
HEX (short)#224
RGBrgb(34, 34, 68)
RGB (0–1)0.1333, 0.1333, 0.2667
RGB percentages13.3%, 13.3%, 26.7%
HSLhsl(240, 33.3%, 20%)
HSV / HSBhsv(240, 50%, 26.7%)
CMYK50%, 50%, 0%, 73.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,236,996
CSS custom property--colour: #222244;
Brightness & contrast
Relative luminance0.01901WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.21:1
Contrast with white15.21:1WCAG normal text: AAA
Contrast with black1.38:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#DDDDBB
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.21:1WCAG large text: AAA
Contrast with black, large text1.38:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#444422
Analogous#223344, #332244
Triadic#442222, #224422
Split complementary#443322, #334422
Tetradic#442233, #444422, #224433
Tints, shades & saturation
Channel breakdown
R34
G34
B68
Red34 (13.3%)
Green34 (13.3%)
Blue68 (26.7%)
Hue240°
Saturation (HSL)33.33%
Lightness20%
Dominant channelBlue
Hex per channelR 22 · G 22 · B 44
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Harmonies
Similar named colours
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