31012472712 has 128 divisors (see below), whose sum is σ = 85088304000. Its totient is φ = 9361059840.

The previous prime is 31012472707. The next prime is 31012472741. The reversal of 31012472712 is 21727421013.

It is a self number, because there is not a number n which added to its sum of digits gives 31012472712.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7972464 + ... + 7976352.

It is an arithmetic number, because the mean of its divisors is an integer number (664752375).

Almost surely, 2^31012472712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31012472712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42544152000).

31012472712 is an abundant number, since it is smaller than the sum of its proper divisors (54075831288).

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

31012472712 is a wasteful number, since it uses less digits than its factorization.

31012472712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391 (or 4387 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

Adding to 31012472712 its reverse (21727421013), we get a palindrome (52739893725).

The spelling of 31012472712 in words is "thirty-one billion, twelve million, four hundred seventy-two thousand, seven hundred twelve".