31240551504 has 160 divisors (see below), whose sum is σ = 86265907200. Its totient is φ = 9720082944.

The previous prime is 31240551493. The next prime is 31240551509. The reversal of 31240551504 is 40515504213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240551509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11642547 + ... + 11645229.

It is an arithmetic number, because the mean of its divisors is an integer number (539161920).

Almost surely, 2^31240551504 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 31240551504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43132953600).

31240551504 is an abundant number, since it is smaller than the sum of its proper divisors (55025355696).

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

31240551504 is a wasteful number, since it uses less digits than its factorization.

31240551504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 31240551504 in words is "thirty-one billion, two hundred forty million, five hundred fifty-one thousand, five hundred four".