31236072012 has 48 divisors (see below), whose sum is σ = 81725397600. Its totient is φ = 10316496960.

The previous prime is 31236071987. The next prime is 31236072013. The reversal of 31236072012 is 21027063213.

31236072012 is a `hidden beast` number, since 3 + 1 + 23 + 607 + 20 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31236072013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1314939 + ... + 1338482.

It is an arithmetic number, because the mean of its divisors is an integer number (1702612450).

Almost surely, 2^31236072012 is an apocalyptic number.

It is an amenable number.

31236072012 is an abundant number, since it is smaller than the sum of its proper divisors (50489325588).

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

31236072012 is a wasteful number, since it uses less digits than its factorization.

31236072012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653543 (or 2653535 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The spelling of 31236072012 in words is "thirty-one billion, two hundred thirty-six million, seventy-two thousand, twelve".