13731 is nontrivially palindromic in base 10.
13731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a nialpdrome in base 13.
It is a self number, because there is not a number n which added to its sum of digits gives 13731.
213731 is an apocalyptic number.
13731 is a wasteful number, since it uses less digits than its factorization.
13731 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 225.
The square root of 13731 is about 117.1793497166. The cubic root of 13731 is about 23.9460594136.
The spelling of 13731 in words is "thirteen thousand, seven hundred thirty-one".