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| Cardinal | two hundred fifty-five | |||
| Ordinal | 255th (two hundred fifty-fifth) | |||
| Factorization | 3 × 5 × 17 | |||
| Divisors | 1, 3, 5, 15, 17, 51, 85, 255 | |||
| Greek numeral | ΣΝΕ´ | |||
| Roman numeral | CCLV | |||
| Binary | 111111112 | |||
| Ternary | 1001103 | |||
| Senary | 11036 | |||
| Octal | 3778 | |||
| Duodecimal | 19312 | |||
| Hexadecimal | FF16 | |||
255 (two hundred [and] fifty-five) is the natural number following 254 and preceding 256.