| Next prime | 281 |
| Previous prime | 271 |
| Octal | (425)8 |
| Hexadecimal | (115)16 |
| Prime gap | 4 |
| 17th Prime triplet (the smallest number) | The others are 281 and 283 . |
| 17th Cousin prime (the small number) | The big number is 281 . |
| 34th Sexy prime (the small number) | The big number is 283 . |
| 27th Prime of the Form 3n+1 | 132 + 3 * 62 |
| 27th Prime of the Form 4n+1 | 92 + 142 |