Number
203
- Positive
- Odd
- Composite
- 3 digits
203 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value203
Digit count3
Digit sum5
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation7 × 29
Distinct prime factors27, 29
Number of divisors4
Sum of divisors σ(n)240
Aliquot sum37sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)168integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 7, 29, 2034 in total
Arithmetic
Representations
Decimal203
Binary110010118 bits
Octal313
HexadecimalCB
Base 365N
Roman numeralCCIII
In wordstwo hundred and three
Ordinaltwo hundred and third
Scientific notation2.03 × 10^2
Engineering notation203
Nearest landmarks
Powers & multiples
203 to the power 241,209
203 to the power 38,365,427
203 to the power 41,698,181,681
203 to the power 5344,730,881,243
First ten multiples203, 406, 609, 812, 1,015, 1,218, 1,421, 1,624, 1,827, 2,030
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 3
Divisible by 5No, remainder 3
Divisible by 6No, remainder 5
Divisible by 7Yes
Divisible by 8No, remainder 3
Divisible by 9No, remainder 5
Divisible by 10No, remainder 3
Divisible by 11No, remainder 5
Divisible by 12No, remainder 11
Divisible by 100No, remainder 3
Collatz (3n + 1) trajectory
Steps to reach 139the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps203 → 610 → 305 → 916 → 458 → 229 → 688 → 344 → 172 → 86 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage20,300%
203% as a decimal2.03
203% of 100203
203% of 1,0002,030
As a fraction of 100203/100
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Derived from 203
Other readings
Also reads as
#220033 (colour)
- #220033
- Violet
- Dark
- Nearest: Midnight blue
#220033 is a violet with RGB values 34, 0, 51 and HSL 280°, 100%, 10%. It is a dark colour, so white text on it reaches 18.8:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.
Colour values
#220033#220033
HEX#220033
HEX (short)#203
RGBrgb(34, 0, 51)
RGB (0–1)0.1333, 0, 0.2
RGB percentages13.3%, 0%, 20%
HSLhsl(280, 100%, 10%)
HSV / HSBhsv(280, 100%, 20%)
CMYK33.3%, 100%, 0%, 80%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,228,275
CSS custom property--colour: #220033;
Brightness & contrast
Relative luminance0.00579WCAG 2.x, 0 is black and 1 is white
Perceived brightness25.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.82:1
Contrast with white18.82:1WCAG normal text: AAA
Contrast with black1.12:1WCAG normal text: Fail
Greyscale equivalent#0B0B0B
Inverted#DDFFCC
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.82:1WCAG large text: AAA
Contrast with black, large text1.12:1WCAG large text: Fail
Named colours
Hue familyviolet
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#113300
Analogous#090033, #33002A
Triadic#332200, #003322
Split complementary#2A3300, #003308
Tetradic#330900, #113300, #002B33
Tints, shades & saturation
Channel breakdown
R34
G0
B51
Red34 (13.3%)
Green0 (0%)
Blue51 (20%)
Hue280°
Saturation (HSL)100%
Lightness10%
Dominant channelBlue
Hex per channelR 22 · G 00 · B 33
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Harmonies
Similar named colours
Also reads as
HTTP 203 Non-Authoritative Information (http status)
- 203 Non-Authoritative Information
- Success
- RFC 9110
HTTP 203 Non-Authoritative Information is a success response: the response was modified by a proxy. It is defined in RFC 9110, and the request was received, understood and accepted.
What it means
Status code203
Reason phraseNon-Authoritative Informationadvisory only; clients must not depend on the wording
Class2xx Success
MeaningThe response was modified by a proxy
Defined inRFC 9110
Cacheable by defaultYesheuristically cacheable without explicit headers (RFC 9110 §15.1)
How clients behave
Indicates an errorNo
Whose faultNeither, it succeeded
Body expectedUsually
The 2xx class
Class meaningThe request was received, understood and accepted
Codes in this class10
Lowest in class200
Highest in class226
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