31147372 has 24 divisors (see below), whose sum is σ = 56130480. Its totient is φ = 15114240.

The previous prime is 31147367. The next prime is 31147373. The reversal of 31147372 is 27374113.

It is a self number, because there is not a number n which added to its sum of digits gives 31147372.

It is not an unprimeable number, because it can be changed into a prime (31147373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41779 + ... + 42517.

It is an arithmetic number, because the mean of its divisors is an integer number (2338770).

Almost surely, 2^31147372 is an apocalyptic number.

It is an amenable number.

31147372 is a deficient number, since it is larger than the sum of its proper divisors (24983108).

31147372 is a wasteful number, since it uses less digits than its factorization.

31147372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1039 counting only the distinct ones).

The product of its digits is 3528, while the sum is 28.

The square root of 31147372 is about 5580.9830675249. The cubic root of 31147372 is about 314.6350758488.

The spelling of 31147372 in words is "thirty-one million, one hundred forty-seven thousand, three hundred seventy-two".