Compare 181 vs 2521
| Property | 181 | 2521 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1811 | 25211 |
| Prime factorization | 181 | 2521 |
| Divisors count | 2 | 2 |
| Divisors | 1, 181 | 1, 2521 |
| Number of properties | 8 | 6 |
| Centered square primes | 6th | 18th |
| Chen primes | 33rd | |
| Dihedral primes | 5th | |
| Good primes | 71st | |
| Harmonic primes | 138th | |
| Isolated primes | 226th | |
| Long primes | 16th | |
| Palindromic primes | 9th | |
| Primes | 42nd | 369th |
| Pythagorean primes | 19th | 181st |
| Twin primes (2nd member) | 13th | |
| Roman numberals | CLXXXI | MMDXXI |
| Base 2 | 101101012 | 1001110110012 |
| Base 3 | 202013 | 101101013 |
| Base 4 | 23114 | 2131214 |
| Base 5 | 12115 | 400415 |
| Base 6 | 5016 | 154016 |
| Base 7 | 3467 | 102317 |
| Base 8 | 2658 | 47318 |
| Base 9 | 2219 | 34119 |
| Base 10 | 18110 | 252110 |
| Base 11 | 15511 | 199211 |
| Base 12 | 13112 | 156112 |
| Base 13 | 10c13 | 11bc13 |
| Base 14 | cd14 | cc114 |
| Base 15 | c115 | b3115 |
| Base 16 | b516 | 9d916 |