Compare 8215 vs 8221
| Property | 8215 | 8221 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 51 × 311 × 531 | 82211 |
| Prime factorization | 5 × 31 × 53 | 8221 |
| Divisors count | 8 | 2 |
| Divisors | 1, 5, 31, 53, 155, 265, 1643, 8215 | 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 | 100000000101112 | 100000000111012 |
| Base 3 | 1020210213 | 1020211113 |
| Base 4 | 20001134 | 20001314 |
| Base 5 | 2303305 | 2303415 |
| Base 6 | 1020116 | 1020216 |
| Base 7 | 326447 | 326537 |
| Base 8 | 200278 | 200358 |
| Base 9 | 122379 | 122449 |
| Base 10 | 821510 | 822110 |
| Base 11 | 619911 | 61a411 |
| Base 12 | 490712 | 491112 |
| Base 13 | 397c13 | 398513 |
| Base 14 | 2dcb14 | 2dd314 |
| Base 15 | 267a15 | 268115 |
| Base 16 | 201716 | 201d16 |