31190972 has 6 divisors (see below), whose sum is σ = 54584208. Its totient is φ = 15595484.

The previous prime is 31190933. The next prime is 31190981. The reversal of 31190972 is 27909113.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3898868 + ... + 3898875.

It is an arithmetic number, because the mean of its divisors is an integer number (9097368).

Almost surely, 2^31190972 is an apocalyptic number.

It is an amenable number.

31190972 is a deficient number, since it is larger than the sum of its proper divisors (23393236).

31190972 is a wasteful number, since it uses less digits than its factorization.

31190972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7797747 (or 7797745 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 31190972 is about 5584.8878234034. The cubic root of 31190972 is about 314.7818158202.

The spelling of 31190972 in words is "thirty-one million, one hundred ninety thousand, nine hundred seventy-two".