Compare 155 vs 163
| Property | 155 | 163 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 311 | 1631 |
| Prime factorization | 5 × 31 | 163 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 31, 155 | 1, 163 |
| Number of properties | 1 | 7 |
| Cousin primes (1st member) | 13th | |
| Isolated primes | 15th | |
| Lucky primes | 12th | |
| Pierpont primes | 12th | |
| Primes | 38th | |
| Semiprimes | 51st | |
| Sexy primes (2nd member) | 22nd | |
| Sexy prime triplets (3rd member) | 12th | |
| Roman numberals | CLV | CLXIII |
| Base 2 | 100110112 | 101000112 |
| Base 3 | 122023 | 200013 |
| Base 4 | 21234 | 22034 |
| Base 5 | 11105 | 11235 |
| Base 6 | 4156 | 4316 |
| Base 7 | 3117 | 3227 |
| Base 8 | 2338 | 2438 |
| Base 9 | 1829 | 2019 |
| Base 10 | 15510 | 16310 |
| Base 11 | 13111 | 13911 |
| Base 12 | 10b12 | 11712 |
| Base 13 | bc13 | c713 |
| Base 14 | b114 | b914 |
| Base 15 | a515 | ad15 |
| Base 16 | 9b16 | a316 |