Numeric Value: 31

The folowing table expresses '31' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.

BaseDR5DR4DR3DR2DR1
211111 101101
3 1011 101
4  13313,101
5  111 3
6   51,101
7   43,101
8   37,123
9   347
10   314
11   29,101
12   279
13   257
14   235
15   213
16   1F,101

Math World

Factors: Prime

31 is in the Pythagorean Triple: (31, 480, 481).

31 is the 3rd Mersenne number (p=5).

Physical World

31 is the atomic weight of Gallium (Ga).