Compare 201581 vs 201809
| Property | 201581 | 201809 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2015811 | 2018091 |
| Prime factorization | 201581 | 201809 |
| Divisors count | 2 | 2 |
| Divisors | 1, 201581 | 1, 201809 |
| Number of properties | 8 | 5 |
| Additive primes | 7286th | |
| Chen primes | 7572nd | 7580th |
| Cousin primes (2nd member) | 2148th | |
| Harmonic primes | 6800th | 6807th |
| Isolated primes | 13767th | 13787th |
| Primes | 18106th | 18128th |
| Pythagorean primes | 9037th | 9049th |
| Sophie germain primes | 2069th | |
| Roman numberals | ||
| Base 2 | 1100010011011011012 | 1100010100010100012 |
| Base 3 | 1010201112223 | 1010202111023 |
| Base 4 | 3010312314 | 3011011014 |
| Base 5 | 224223115 | 224242145 |
| Base 6 | 41531256 | 41541456 |
| Base 7 | 14664627 | 15002367 |
| Base 8 | 6115558 | 6121218 |
| Base 9 | 3364589 | 3367429 |
| Base 10 | 20158110 | 20180910 |
| Base 11 | 1284a611 | 12869311 |
| Base 12 | 987a512 | 9895512 |
| Base 13 | 709a313 | 70b1a13 |
| Base 14 | 5366914 | 5378d14 |
| Base 15 | 3eadb15 | 3ebde15 |
| Base 16 | 3136d16 | 3145116 |