31981496 has 16 divisors (see below), whose sum is σ = 60159240. Its totient is φ = 15939040.

The previous prime is 31981487. The next prime is 31981511. The reversal of 31981496 is 69418913.

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 in 3 ways as a sum of consecutive naturals, for example, 3770 + ... + 8841.

Almost surely, 2^31981496 is an apocalyptic number.

It is an amenable number.

31981496 is a deficient number, since it is larger than the sum of its proper divisors (28177744).

31981496 is a wasteful number, since it uses less digits than its factorization.

31981496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12934 (or 12930 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 31981496 is about 5655.2184750017. The cubic root of 31981496 is about 317.4190042841.

The spelling of 31981496 in words is "thirty-one million, nine hundred eighty-one thousand, four hundred ninety-six".