31116912 has 20 divisors (see below), whose sum is σ = 80385480. Its totient is φ = 10372288.

The previous prime is 31116887. The next prime is 31116959. The reversal of 31116912 is 21961113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324087 + ... + 324182.

It is an arithmetic number, because the mean of its divisors is an integer number (4019274).

Almost surely, 2^31116912 is an apocalyptic number.

It is an amenable number.

31116912 is an abundant number, since it is smaller than the sum of its proper divisors (49268568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31116912 is a wasteful number, since it uses less digits than its factorization.

31116912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648280 (or 648274 counting only the distinct ones).

The product of its digits is 324, while the sum is 24.

The square root of 31116912 is about 5578.2534901168. The cubic root of 31116912 is about 314.5324785339.

The spelling of 31116912 in words is "thirty-one million, one hundred sixteen thousand, nine hundred twelve".