31696916 has 6 divisors (see below), whose sum is σ = 55469610. Its totient is φ = 15848456.

The previous prime is 31696909. The next prime is 31696927. The reversal of 31696916 is 61969613.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 16 = 5630^2 + 4^2 .

It is a super-2 number, since 2×31696916² = 2009388967822112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3962111 + ... + 3962118.

It is an arithmetic number, because the mean of its divisors is an integer number (9244935).

Almost surely, 2^31696916 is an apocalyptic number.

It is an amenable number.

31696916 is a deficient number, since it is larger than the sum of its proper divisors (23772694).

31696916 is a wasteful number, since it uses less digits than its factorization.

31696916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7924233 (or 7924231 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 31696916 is about 5630.0014209590. The cubic root of 31696916 is about 316.4747044631.

It can be divided in two parts, 316969 and 16, that multiplied together give a square (5071504 = 2252²).

The spelling of 31696916 in words is "thirty-one million, six hundred ninety-six thousand, nine hundred sixteen".