Compare 151 vs 181
| Property | 151 | 181 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1511 | 1811 |
| Prime factorization | 151 | 181 |
| Divisors count | 2 | 2 |
| Divisors | 1, 151 | 1, 181 |
| Number of properties | 9 | 8 |
| Additive primes | 20th | |
| Centered decagonal primes | 5th | |
| Centered square primes | 6th | |
| Chen primes | 33rd | |
| Dihedral primes | 5th | |
| Long primes | 16th | |
| Lucky primes | 11th | |
| Multiplicative primes | 11th | |
| Palindromic primes | 8th | 9th |
| Primes | 36th | 42nd |
| Pythagorean primes | 19th | |
| Sexy primes (1st member) | 21st | |
| Sexy prime triplets (1st member) | 12th | |
| Twin primes (2nd member) | 12th | 13th |
| Roman numberals | CLI | CLXXXI |
| Base 2 | 100101112 | 101101012 |
| Base 3 | 121213 | 202013 |
| Base 4 | 21134 | 23114 |
| Base 5 | 11015 | 12115 |
| Base 6 | 4116 | 5016 |
| Base 7 | 3047 | 3467 |
| Base 8 | 2278 | 2658 |
| Base 9 | 1779 | 2219 |
| Base 10 | 15110 | 18110 |
| Base 11 | 12811 | 15511 |
| Base 12 | 10712 | 13112 |
| Base 13 | b813 | 10c13 |
| Base 14 | ab14 | cd14 |
| Base 15 | a115 | c115 |
| Base 16 | 9716 | b516 |