Compare 8218 vs 8221
| Property | 8218 | 8221 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 71 × 5871 | 82211 |
| Prime factorization | 2 × 7 × 587 | 8221 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 7, 14, 587, 1174, 4109, 8218 | 1, 8221 |
| Number of properties | 0 | 7 |
| Additive primes | 505th | |
| Chen primes | 554th | |
| Lucky primes | 187th | |
| Primes | 1031st | |
| Pythagorean primes | 511th | |
| Super primes | 173rd | |
| Twin primes (2nd member) | 178th | |
| Roman numberals | ||
| Base 2 | 100000000110102 | 100000000111012 |
| Base 3 | 1020211013 | 1020211113 |
| Base 4 | 20001224 | 20001314 |
| Base 5 | 2303335 | 2303415 |
| Base 6 | 1020146 | 1020216 |
| Base 7 | 326507 | 326537 |
| Base 8 | 200328 | 200358 |
| Base 9 | 122419 | 122449 |
| Base 10 | 821810 | 822110 |
| Base 11 | 61a111 | 61a411 |
| Base 12 | 490a12 | 491112 |
| Base 13 | 398213 | 398513 |
| Base 14 | 2dd014 | 2dd314 |
| Base 15 | 267d15 | 268115 |
| Base 16 | 201a16 | 201d16 |