31970072 has 16 divisors (see below), whose sum is σ = 61564560. Its totient is φ = 15552864.

The previous prime is 31970063. The next prime is 31970101. The reversal of 31970072 is 27007913.

It is a happy number.

It is a congruent number.

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, 53708 + ... + 54299.

It is an arithmetic number, because the mean of its divisors is an integer number (3847785).

Almost surely, 2^31970072 is an apocalyptic number.

It is an amenable number.

31970072 is a deficient number, since it is larger than the sum of its proper divisors (29594488).

31970072 is a wasteful number, since it uses less digits than its factorization.

31970072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108050 (or 108046 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 31970072 is about 5654.2083442335. The cubic root of 31970072 is about 317.3812050667.

Adding to 31970072 its reverse (27007913), we get a palindrome (58977985).

The spelling of 31970072 in words is "thirty-one million, nine hundred seventy thousand, seventy-two".