number.wiki
Number

100

100 — One Hundred

100 is a composite number, even, a calendar year.

One hundred is the square of 10 and the basis of percentages. It marks a natural milestone in many counting and measurement systems.

Sources https://en.wikipedia.org/wiki/100
Abundant Number Curated Happy Number Harshad / Niven Perfect Square Power of Ten Powerful Number

Properties

Parity
Even
Digit count
3
Digit sum
1
Digital root
1
Palindrome
No
Divisor count
9
σ(n) — sum of divisors
217

Primality

Prime factorization: 2 2 × 5 2

Divisors & multiples

All divisors (9)
1 · 2 · 4 · 5 · 10 · 20 · 25 · 50 · 100
Aliquot sum (sum of proper divisors): 117
Factor pairs (a × b = 100)
1 × 100
2 × 50
4 × 25
5 × 20
10 × 10
First multiples
100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900 · 1,000

Representations

In words
one hundred
Ordinal
100th
Roman numeral
C
Binary
1100100
Octal
144
Hexadecimal
64

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 100, here are decompositions:

  • 3 + 97 = 100
  • 11 + 89 = 100
  • 17 + 83 = 100
  • 29 + 71 = 100
  • 41 + 59 = 100
  • 47 + 53 = 100
ASCII character

As an ASCII codepoint, 100 is d. Printable ASCII character d.

HTTP status code

HTTP 100 Continue — Server has received the request headers; client should continue with the body.

1xx class: Informational.

Hex color
#000064
RGB(0, 0, 100)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.100.