31243525040 has 120 divisors (see below), whose sum is σ = 91001206800. Its totient is φ = 9888044544.

The previous prime is 31243525037. The next prime is 31243525063. The reversal of 31243525040 is 4052534213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31243524994 and 31243525012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255590 + ... + 357509.

It is an arithmetic number, because the mean of its divisors is an integer number (758343390).

Almost surely, 2^31243525040 is an apocalyptic number.

It is an amenable number.

31243525040 is an abundant number, since it is smaller than the sum of its proper divisors (59757681760).

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

31243525040 is a wasteful number, since it uses less digits than its factorization.

31243525040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613139 (or 613126 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 31243525040 in words is "thirty-one billion, two hundred forty-three million, five hundred twenty-five thousand, forty".