Compare 2005 vs 2021
| Property | 2005 | 2021 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 4011 | 431 × 471 |
| Prime factorization | 5 × 401 | 43 × 47 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 401, 2005 | 1, 43, 47, 2021 |
| Number of properties | 1 | 1 |
| Semiprimes | 578th | 581st |
| Roman numberals | MMV | MMXXI |
| Base 2 | 111110101012 | 111111001012 |
| Base 3 | 22020213 | 22022123 |
| Base 4 | 1331114 | 1332114 |
| Base 5 | 310105 | 310415 |
| Base 6 | 131416 | 132056 |
| Base 7 | 55637 | 56157 |
| Base 8 | 37258 | 37458 |
| Base 9 | 26679 | 26859 |
| Base 10 | 200510 | 202110 |
| Base 11 | 156311 | 157811 |
| Base 12 | 11b112 | 120512 |
| Base 13 | bb313 | bc613 |
| Base 14 | a3314 | a4514 |
| Base 15 | 8da15 | 8eb15 |
| Base 16 | 7d516 | 7e516 |