Compare 151 vs 421
| Property | 151 | 421 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1511 | 4211 |
| Prime factorization | 151 | 421 |
| Divisors count | 2 | 2 |
| Divisors | 1, 151 | 1, 421 |
| Number of properties | 9 | 6 |
| Additive primes | 20th | 48th |
| Centered decagonal primes | 5th | |
| Centered square primes | 8th | |
| Lucky primes | 11th | 23rd |
| Multiplicative primes | 11th | |
| Palindromic primes | 8th | |
| Primes | 36th | 82nd |
| Pythagorean primes | 40th | |
| Sexy primes (1st member) | 21st | |
| Sexy prime triplets (1st member) | 12th | |
| Twin primes (2nd member) | 12th | 22nd |
| Roman numberals | CLI | CDXXI |
| Base 2 | 100101112 | 1101001012 |
| Base 3 | 121213 | 1201213 |
| Base 4 | 21134 | 122114 |
| Base 5 | 11015 | 31415 |
| Base 6 | 4116 | 15416 |
| Base 7 | 3047 | 11417 |
| Base 8 | 2278 | 6458 |
| Base 9 | 1779 | 5179 |
| Base 10 | 15110 | 42110 |
| Base 11 | 12811 | 35311 |
| Base 12 | 10712 | 2b112 |
| Base 13 | b813 | 26513 |
| Base 14 | ab14 | 22114 |
| Base 15 | a115 | 1d115 |
| Base 16 | 9716 | 1a516 |