Compare 1985 vs 2021
| Property | 1985 | 2021 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 3971 | 431 × 471 |
| Prime factorization | 5 × 397 | 43 × 47 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 397, 1985 | 1, 43, 47, 2021 |
| Number of properties | 1 | 1 |
| Semiprimes | 575th | 581st |
| Roman numberals | MCMLXXXV | MMXXI |
| Base 2 | 111110000012 | 111111001012 |
| Base 3 | 22011123 | 22022123 |
| Base 4 | 1330014 | 1332114 |
| Base 5 | 304205 | 310415 |
| Base 6 | 131056 | 132056 |
| Base 7 | 55347 | 56157 |
| Base 8 | 37018 | 37458 |
| Base 9 | 26459 | 26859 |
| Base 10 | 198510 | 202110 |
| Base 11 | 154511 | 157811 |
| Base 12 | 119512 | 120512 |
| Base 13 | b9913 | bc613 |
| Base 14 | a1b14 | a4514 |
| Base 15 | 8c515 | 8eb15 |
| Base 16 | 7c116 | 7e516 |