209 (number)
From Infogalactic: the planetary knowledge core
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|---|---|---|---|---|
| Cardinal | two hundred nine | |||
| Ordinal | 209th (two hundred and ninth) |
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| Factorization | 11 × 19 | |||
| Roman numeral | CCIX | |||
| Binary | 110100012 | |||
| Ternary | 212023 | |||
| Quaternary | 31014 | |||
| Quinary | 13145 | |||
| Senary | 5456 | |||
| Octal | 3218 | |||
| Duodecimal | 15512 | |||
| Hexadecimal | D116 | |||
| Vigesimal | A920 | |||
| Base 36 | 5T36 | |||
209 (two hundred [and] nine) is the natural number following 208 and preceding 210.
In mathematics
There are 209 spanning trees in a 2 × 5 grid graph,[1] and 209 partial permutations on four elements.[2]
See also
- Asteroid 209 Dido
- List of highways numbered 209
- Type 209 submarine, German submarine developed for export
References
- ↑ "Sloane's A001353 : a(n) = 4*a(n-1) - a(n-2) with a(0) = 0, a(1) = 1", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ "Sloane's A002720 : Number of partial permutations of an n-set; number of n X n binary matrices with at most one 1 in each row and column", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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