31216996 has 12 divisors (see below), whose sum is σ = 55399680. Its totient is φ = 15388520.

The previous prime is 31216993. The next prime is 31217009. The reversal of 31216996 is 69961213.

It is not an unprimeable number, because it can be changed into a prime (31216993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54676 + ... + 55243.

It is an arithmetic number, because the mean of its divisors is an integer number (4616640).

Almost surely, 2^31216996 is an apocalyptic number.

It is an amenable number.

31216996 is a deficient number, since it is larger than the sum of its proper divisors (24182684).

31216996 is a wasteful number, since it uses less digits than its factorization.

31216996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109994 (or 109992 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 31216996 is about 5587.2171964226. The cubic root of 31216996 is about 314.8693369225.

The spelling of 31216996 in words is "thirty-one million, two hundred sixteen thousand, nine hundred ninety-six".