31042425440 has 48 divisors (see below), whose sum is σ = 78979099248. Its totient is φ = 11461817856.

The previous prime is 31042425373. The next prime is 31042425451. The reversal of 31042425440 is 4452424013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7460042 + ... + 7464201.

It is an arithmetic number, because the mean of its divisors is an integer number (1645397901).

Almost surely, 2^31042425440 is an apocalyptic number.

It is an amenable number.

31042425440 is an abundant number, since it is smaller than the sum of its proper divisors (47936673808).

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

31042425440 is a wasteful number, since it uses less digits than its factorization.

31042425440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14924271 (or 14924263 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 31042425440 its reverse (4452424013), we get a palindrome (35494849453).

The spelling of 31042425440 in words is "thirty-one billion, forty-two million, four hundred twenty-five thousand, four hundred forty".