Compare 1811 vs 1822
| Property | 1811 | 1822 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 18111 | 21 × 9111 |
| Prime factorization | 1811 | 2 × 911 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1811 | 1, 2, 911, 1822 |
| Number of properties | 8 | 1 |
| Additive primes | 149th | |
| Dihedral primes | 7th | |
| Emirps | 87th | |
| Harmonic primes | 100th | |
| Isolated primes | 169th | |
| Long primes | 109th | |
| Primes | 280th | |
| Semiprimes | 525th | |
| Sophie germain primes | 56th | |
| Roman numberals | MDCCCXI | MDCCCXXII |
| Base 2 | 111000100112 | 111000111102 |
| Base 3 | 21110023 | 21111113 |
| Base 4 | 1301034 | 1301324 |
| Base 5 | 242215 | 242425 |
| Base 6 | 122156 | 122346 |
| Base 7 | 51657 | 52127 |
| Base 8 | 34238 | 34368 |
| Base 9 | 24329 | 24449 |
| Base 10 | 181110 | 182210 |
| Base 11 | 13a711 | 140711 |
| Base 12 | 106b12 | 107a12 |
| Base 13 | a9413 | aa213 |
| Base 14 | 93514 | 94214 |
| Base 15 | 80b15 | 81715 |
| Base 16 | 71316 | 71e16 |