31920052 has 6 divisors (see below), whose sum is σ = 55860098. Its totient is φ = 15960024.

The previous prime is 31920043. The next prime is 31920071. The reversal of 31920052 is 25002913.

It can be written as a sum of positive squares in only one way, i.e., 15968016 + 15952036 = 3996^2 + 3994^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990003 + ... + 3990010.

Almost surely, 2^31920052 is an apocalyptic number.

It is an amenable number.

31920052 is a deficient number, since it is larger than the sum of its proper divisors (23940046).

31920052 is a wasteful number, since it uses less digits than its factorization.

31920052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980017 (or 7980015 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 31920052 is about 5649.7833586785. The cubic root of 31920052 is about 317.2155950281.

Adding to 31920052 its reverse (25002913), we get a palindrome (56922965).

The spelling of 31920052 in words is "thirty-one million, nine hundred twenty thousand, fifty-two".