31981732532 has 12 divisors (see below), whose sum is σ = 55972842240. Its totient is φ = 15989491896.

The previous prime is 31981732529. The next prime is 31981732561. The reversal of 31981732532 is 23523718913.

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, 290318 + ... + 385029.

It is an arithmetic number, because the mean of its divisors is an integer number (4664403520).

Almost surely, 2^31981732532 is an apocalyptic number.

It is an amenable number.

31981732532 is a deficient number, since it is larger than the sum of its proper divisors (23991109708).

31981732532 is a wasteful number, since it uses less digits than its factorization.

31981732532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687190 (or 687188 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The spelling of 31981732532 in words is "thirty-one billion, nine hundred eighty-one million, seven hundred thirty-two thousand, five hundred thirty-two".