Compare 1831 vs 1931
| Property | 1831 | 1931 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 18311 | 19311 |
| Prime factorization | 1831 | 1931 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1831 | 1, 1931 |
| Number of properties | 6 | 5 |
| Additive primes | 150th | |
| Chen primes | 182nd | |
| Emirps | 88th | |
| Harmonic primes | 101st | 108th |
| Isolated primes | 171st | |
| Lucky primes | 67th | |
| Primes | 282nd | 294th |
| Sophie germain primes | 59th | |
| Twin primes (1st member) | 59th | |
| Roman numberals | MDCCCXXXI | MCMXXXI |
| Base 2 | 111001001112 | 111100010112 |
| Base 3 | 21112113 | 21221123 |
| Base 4 | 1302134 | 1320234 |
| Base 5 | 243115 | 302115 |
| Base 6 | 122516 | 125356 |
| Base 7 | 52247 | 54267 |
| Base 8 | 34478 | 36138 |
| Base 9 | 24549 | 25759 |
| Base 10 | 183110 | 193110 |
| Base 11 | 141511 | 14a611 |
| Base 12 | 108712 | 114b12 |
| Base 13 | aab13 | b5713 |
| Base 14 | 94b14 | 9bd14 |
| Base 15 | 82115 | 88b15 |
| Base 16 | 72716 | 78b16 |