Compare 181 vs 181
| Property | 181 | 181 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1811 | 1811 |
| Prime factorization | 181 | 181 |
| Divisors count | 2 | 2 |
| Divisors | 1, 181 | 1, 181 |
| Number of properties | 8 | 8 |
| Centered square primes | 6th | 6th |
| Chen primes | 33rd | 33rd |
| Dihedral primes | 5th | 5th |
| Long primes | 16th | 16th |
| Palindromic primes | 9th | 9th |
| Primes | 42nd | 42nd |
| Pythagorean primes | 19th | 19th |
| Twin primes (2nd member) | 13th | 13th |
| Roman numberals | CLXXXI | CLXXXI |
| Base 2 | 101101012 | 101101012 |
| Base 3 | 202013 | 202013 |
| Base 4 | 23114 | 23114 |
| Base 5 | 12115 | 12115 |
| Base 6 | 5016 | 5016 |
| Base 7 | 3467 | 3467 |
| Base 8 | 2658 | 2658 |
| Base 9 | 2219 | 2219 |
| Base 10 | 18110 | 18110 |
| Base 11 | 15511 | 15511 |
| Base 12 | 13112 | 13112 |
| Base 13 | 10c13 | 10c13 |
| Base 14 | cd14 | cd14 |
| Base 15 | c115 | c115 |
| Base 16 | b516 | b516 |