Compare 551 vs 561
| Property | 551 | 561 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 191 × 291 | 31 × 111 × 171 |
| Prime factorization | 19 × 29 | 3 × 11 × 17 |
| Divisors count | 4 | 8 |
| Divisors | 1, 19, 29, 551 | 1, 3, 11, 17, 33, 51, 187, 561 |
| Number of properties | 1 | 0 |
| Semiprimes | 172nd | |
| Roman numberals | DLI | DLXI |
| Base 2 | 10001001112 | 10001100012 |
| Base 3 | 2021023 | 2022103 |
| Base 4 | 202134 | 203014 |
| Base 5 | 42015 | 42215 |
| Base 6 | 23156 | 23336 |
| Base 7 | 14157 | 14317 |
| Base 8 | 10478 | 10618 |
| Base 9 | 6729 | 6839 |
| Base 10 | 55110 | 56110 |
| Base 11 | 46111 | 47011 |
| Base 12 | 39b12 | 3a912 |
| Base 13 | 33513 | 34213 |
| Base 14 | 2b514 | 2c114 |
| Base 15 | 26b15 | 27615 |
| Base 16 | 22716 | 23116 |