381

381 = 3 x 127.

381 is 101111101 in base 2 (binary). It is 575 in base 8 and 111 in base 19.

381 is the sum of the first 16 primes: 381 = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53.

The sum of the divisors of 381 is a cube: 1 + 3 + 127 + 381 = 512 = 8³.

381 can represent the term "I Love You" (three words, eight letters, one meaning).

Source: Wikipedia