Thirteen thousand eight hundred eighty one
13881 is an odd number.
13881 is a Harshad number, which means it is divisible by the sum of its digits (1 + 3 + 8 + 8 + 1 = 21, and 13881 is divisible by 21).
In binary, 13881 is represented as 11011000111001.
In hex, 13881 is represented as 3639.
Prime factorization of 13881: 3 * 7 * 661.