Compare 217981 vs 218021
| Property | 217981 | 218021 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2179811 | 2180211 |
| Prime factorization | 217981 | 218021 |
| Divisors count | 2 | 2 |
| Divisors | 1, 217981 | 1, 218021 |
| Number of properties | 5 | 5 |
| Chen primes | 8109th | |
| Harmonic primes | 7292nd | 7293rd |
| Isolated primes | 14822nd | |
| Long primes | 7279th | |
| Primes | 19443rd | 19445th |
| Pythagorean primes | 9702nd | 9703rd |
| Twin primes (2nd member) | 2312th | |
| Roman numberals | ||
| Base 2 | 1101010011011111012 | 1101010011101001012 |
| Base 3 | 1020020001013 | 1020020012123 |
| Base 4 | 3110313314 | 3110322114 |
| Base 5 | 234334115 | 234340415 |
| Base 6 | 44011016 | 44012056 |
| Base 7 | 15653417 | 15654267 |
| Base 8 | 6515758 | 6516458 |
| Base 9 | 3620119 | 3620559 |
| Base 10 | 21798110 | 21802110 |
| Base 11 | 13985511 | 13989111 |
| Base 12 | a619112 | a620512 |
| Base 13 | 782aa13 | 7830b13 |
| Base 14 | 5962114 | 5964d14 |
| Base 15 | 448c115 | 448eb15 |
| Base 16 | 3537d16 | 353a516 |