number.wiki
Number

209

209 is a composite number, odd, a calendar year.

Deficient Number Harshad / Niven Squarefree Year

Properties

Parity
Odd
Digit count
3
Digit sum
11
Digital root
2
Palindrome
No
Divisor count
4
σ(n) — sum of divisors
240

Primality

Prime factorization: 11 × 19

Divisors & multiples

All divisors (4)
1 · 11 · 19 · 209
Aliquot sum (sum of proper divisors): 31
Factor pairs (a × b = 209)
1 × 209
11 × 19
First multiples
209 · 418 · 627 · 836 · 1,045 · 1,254 · 1,463 · 1,672 · 1,881 · 2,090

Representations

In words
two hundred nine
Ordinal
209th
Roman numeral
CCIX
Binary
11010001
Octal
321
Hexadecimal
D1

Also seen as

Unicode codepoint
Ñ
U+00D1
Uppercase letter (Lu)

UTF-8 encoding: C3 91 (2 bytes).

Hex color
#0000D1
RGB(0, 0, 209)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.209.