31671916 has 12 divisors (see below), whose sum is σ = 55467720. Its totient is φ = 15824000.

The previous prime is 31671869. The next prime is 31671947. The reversal of 31671916 is 61917613.

It is a super-2 number, since 2×31671916² = 2006220526222112, which contains 22 as substring.

It is an unprimeable number.

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, 5916 + ... + 9916.

It is an arithmetic number, because the mean of its divisors is an integer number (4622310).

Almost surely, 2^31671916 is an apocalyptic number.

It is an amenable number.

31671916 is a deficient number, since it is larger than the sum of its proper divisors (23795804).

31671916 is a wasteful number, since it uses less digits than its factorization.

31671916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5984 (or 5982 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 31671916 is about 5627.7807348901. The cubic root of 31671916 is about 316.3914792412.

The spelling of 31671916 in words is "thirty-one million, six hundred seventy-one thousand, nine hundred sixteen".