Compare 157 vs 251
| Property | 157 | 251 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1571 | 2511 |
| Prime factorization | 157 | 251 |
| Divisors count | 2 | 2 |
| Divisors | 1, 157 | 1, 251 |
| Number of properties | 11 | 10 |
| Additive primes | 21st | |
| Chen primes | 30th | 41st |
| Emirps | 12th | |
| Good primes | 19th | |
| Harmonic primes | 13th | 20th |
| Isolated primes | 14th | 21st |
| Primes | 37th | 54th |
| Pythagorean primes | 17th | |
| Sexy primes (1st member) | 22nd | 30th |
| Sexy primes (2nd member) | 21st | |
| Sexy prime quadrupletss (1st member) | 5th | |
| Sexy prime triplets (1st member) | 15th | |
| Sexy prime triplets (2nd member) | 12th | |
| Solinas primes | 30th | |
| Sophie germain primes | 18th | |
| Super primes | 12th | |
| Roman numberals | CLVII | CCLI |
| Base 2 | 100111012 | 111110112 |
| Base 3 | 122113 | 1000223 |
| Base 4 | 21314 | 33234 |
| Base 5 | 11125 | 20015 |
| Base 6 | 4216 | 10556 |
| Base 7 | 3137 | 5067 |
| Base 8 | 2358 | 3738 |
| Base 9 | 1849 | 3089 |
| Base 10 | 15710 | 25110 |
| Base 11 | 13311 | 20911 |
| Base 12 | 11112 | 18b12 |
| Base 13 | c113 | 16413 |
| Base 14 | b314 | 13d14 |
| Base 15 | a715 | 11b15 |
| Base 16 | 9d16 | fb16 |