Compare 21031 vs 21139
| Property | 21031 | 21139 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 210311 | 211391 |
| Prime factorization | 21031 | 21139 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21031 | 1, 21139 |
| Number of properties | 3 | 5 |
| Additive primes | 1098th | |
| Cousin primes (1st member) | 360th | |
| Good primes | 266th | |
| Isolated primes | 1650th | 1656th |
| Lucky primes | 385th | |
| Primes | 2367th | 2375th |
| Roman numberals | ||
| Base 2 | 1010010001001112 | 1010010100100112 |
| Base 3 | 10012112213 | 10012222213 |
| Base 4 | 110202134 | 110221034 |
| Base 5 | 11331115 | 11340245 |
| Base 6 | 2412116 | 2415116 |
| Base 7 | 1152137 | 1154267 |
| Base 8 | 510478 | 512238 |
| Base 9 | 317579 | 318879 |
| Base 10 | 2103110 | 2113910 |
| Base 11 | 1488a11 | 1497811 |
| Base 12 | 1020712 | 1029712 |
| Base 13 | 975a13 | 981113 |
| Base 14 | 794314 | 79bd14 |
| Base 15 | 637115 | 63e415 |
| Base 16 | 522716 | 529316 |