31994152 has 16 divisors (see below), whose sum is σ = 60049440. Its totient is φ = 15980976.

The previous prime is 31994147. The next prime is 31994191. The reversal of 31994152 is 25149913.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13143 + ... + 15385.

It is an arithmetic number, because the mean of its divisors is an integer number (3753090).

Almost surely, 2^31994152 is an apocalyptic number.

It is an amenable number.

31994152 is a deficient number, since it is larger than the sum of its proper divisors (28055288).

31994152 is a wasteful number, since it uses less digits than its factorization.

31994152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032 (or 4028 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 31994152 is about 5656.3373308175. The cubic root of 31994152 is about 317.4608693793.

The spelling of 31994152 in words is "thirty-one million, nine hundred ninety-four thousand, one hundred fifty-two".