Compare 1811 vs 1831
| Property | 1811 | 1831 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18111 | 18311 |
| Prime factorization | 1811 | 1831 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1811 | 1, 1831 |
| Number of properties | 8 | 6 |
| Additive primes | 149th | 150th |
| Dihedral primes | 7th | |
| Emirps | 87th | 88th |
| Harmonic primes | 100th | 101st |
| Isolated primes | 169th | 171st |
| Long primes | 109th | |
| Lucky primes | 67th | |
| Primes | 280th | 282nd |
| Sophie germain primes | 56th | |
| Roman numberals | MDCCCXI | MDCCCXXXI |
| Base 2 | 111000100112 | 111001001112 |
| Base 3 | 21110023 | 21112113 |
| Base 4 | 1301034 | 1302134 |
| Base 5 | 242215 | 243115 |
| Base 6 | 122156 | 122516 |
| Base 7 | 51657 | 52247 |
| Base 8 | 34238 | 34478 |
| Base 9 | 24329 | 24549 |
| Base 10 | 181110 | 183110 |
| Base 11 | 13a711 | 141511 |
| Base 12 | 106b12 | 108712 |
| Base 13 | a9413 | aab13 |
| Base 14 | 93514 | 94b14 |
| Base 15 | 80b15 | 82115 |
| Base 16 | 71316 | 72716 |