Compare 2155 vs 2161
| Property | 2155 | 2161 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 4311 | 21611 |
| Prime factorization | 5 × 431 | 2161 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 431, 2155 | 1, 2161 |
| Number of properties | 1 | 3 |
| Isolated primes | 193rd | |
| Primes | 326th | |
| Pythagorean primes | 159th | |
| Semiprimes | 614th | |
| Roman numberals | MMCLV | MMCLXI |
| Base 2 | 1000011010112 | 1000011100012 |
| Base 3 | 22212113 | 22220013 |
| Base 4 | 2012234 | 2013014 |
| Base 5 | 321105 | 321215 |
| Base 6 | 135516 | 140016 |
| Base 7 | 61667 | 62057 |
| Base 8 | 41538 | 41618 |
| Base 9 | 28549 | 28619 |
| Base 10 | 215510 | 216110 |
| Base 11 | 168a11 | 169511 |
| Base 12 | 12b712 | 130112 |
| Base 13 | c9a13 | ca313 |
| Base 14 | add14 | b0514 |
| Base 15 | 98a15 | 99115 |
| Base 16 | 86b16 | 87116 |