The folowing table expresses '161' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|
| 2 | 10100001 | 11,10 | 1 | |||||
| 3 | 12222 | 100 | 1 | |||||
| 4 | 2201 | 11 | 2 | |||||
| 5 | 1121 | 10 | 1 | |||||
| 6 | 425 | 15,10 | 1 | |||||
| 7 | 320 | 5 | ||||||
| 8 | 241 | 7 | ||||||
| 9 | 188 | 18,10 | 1 | |||||
| 10 | 161 | 8 | ||||||
| 11 | 137 | 10 | 1 | |||||
| 12 | 115 | 7 | ||||||
| 13 | C5,14 | 5 | ||||||
| 14 | B7,14 | 5 | ||||||
| 15 | AB,16 | 7 | ||||||
| 16 | A1 | B |
Factors: 7 * 23
161 is in the Pythagorean Triple: (161, 240, 289).