31816996 has 12 divisors (see below), whose sum is σ = 58955148. Its totient is φ = 14972672.

The previous prime is 31816987. The next prime is 31816997. The reversal of 31816996 is 69961813.

It can be written as a sum of positive squares in 2 ways, for example, as 24364096 + 7452900 = 4936^2 + 2730^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31816997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233881 + ... + 234016.

It is an arithmetic number, because the mean of its divisors is an integer number (4912929).

Almost surely, 2^31816996 is an apocalyptic number.

It is an amenable number.

31816996 is a deficient number, since it is larger than the sum of its proper divisors (27138152).

31816996 is a wasteful number, since it uses less digits than its factorization.

31816996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467918 (or 467916 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 31816996 is about 5640.6556356509. The cubic root of 31816996 is about 316.8738431281.

The spelling of 31816996 in words is "thirty-one million, eight hundred sixteen thousand, nine hundred ninety-six".