31351012 has 24 divisors (see below), whose sum is σ = 68402880. Its totient is φ = 12214560.

The previous prime is 31351003. The next prime is 31351031. The reversal of 31351012 is 21015313.

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 7 ways as a sum of consecutive naturals, for example, 50587 + ... + 51202.

It is an arithmetic number, because the mean of its divisors is an integer number (2850120).

Almost surely, 2^31351012 is an apocalyptic number.

It is an amenable number.

31351012 is an abundant number, since it is smaller than the sum of its proper divisors (37051868).

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

31351012 is a wasteful number, since it uses less digits than its factorization.

31351012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101811 (or 101809 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31351012 is about 5599.1974424912. The cubic root of 31351012 is about 315.3192765147.

Adding to 31351012 its reverse (21015313), we get a palindrome (52366325).

The spelling of 31351012 in words is "thirty-one million, three hundred fifty-one thousand, twelve".