Compare 161561 vs 161566
| Property | 161561 | 161566 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 1615611 | 21 × 807831 |
| Prime factorization | 161561 | 2 × 80783 |
| Divisors count | 2 | 4 |
| Divisors | 1, 161561 | 1, 2, 80783, 161566 |
| Number of properties | 8 | 1 |
| Chen primes | 6316th | |
| Emirps | 3259th | |
| Happy primes | 2292nd | |
| Primes | 14813th | |
| Pythagorean primes | 7387th | |
| Semiprimes | 36906th | |
| Sophie germain primes | 1731st | |
| Super primes | 1735th | |
| Twin primes (1st member) | 1815th | |
| Roman numberals | ||
| Base 2 | 1001110111000110012 | 1001110111000111102 |
| Base 3 | 220121212023 | 220121212213 |
| Base 4 | 2131301214 | 2131301324 |
| Base 5 | 201322215 | 201322315 |
| Base 6 | 32435456 | 32435546 |
| Base 7 | 12420117 | 12420167 |
| Base 8 | 4734318 | 4734368 |
| Base 9 | 2655529 | 2655579 |
| Base 10 | 16156110 | 16156610 |
| Base 11 | 10042411 | 10042911 |
| Base 12 | 795b512 | 795ba12 |
| Base 13 | 586ca13 | 5870213 |
| Base 14 | 42c4114 | 42c4614 |
| Base 15 | 32d0b15 | 32d1115 |
| Base 16 | 2771916 | 2771e16 |