231 ( two hundred and thirty-one ) is a natural number between 230 and 232.
- 231 days a year - August 19 (in a leap year on August 18 ).
| 231 | |
|---|---|
| two hundred thirty one | |
| ← 229 · 230 · 231 · 232 · 233 → | |
| Factorization | 3 · 7 · 11 |
| Roman notation | CCXXXI |
| Binary | 11100111 |
| Octal | 347 |
| Hexadecimal | E7 |
In Math
- 21st triangular number
- 11th hexagonal number
- 7th octagonal number
- 22nd sphenic number
Abjadiya
- أبو بكر - Abu Bakr .
- منافس - (munafis is a rival)
In other areas
- 231 years ; 231 BC e.
- In Unicode, 00E7 16 is the code for the character “ ç ” ( Latin Small Letter C With Cedilla ).
- NGC 231 is an open cluster in the constellation Toucan .