31513536040 has 64 divisors (see below), whose sum is σ = 85299811200. Its totient is φ = 10235973888.

The previous prime is 31513536037. The next prime is 31513536073. The reversal of 31513536040 is 4063531513.

It is a junction number, because it is equal to n+sod(n) for n = 31513535993 and 31513536011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2956479 + ... + 2967118.

It is an arithmetic number, because the mean of its divisors is an integer number (1332809550).

Almost surely, 2^31513536040 is an apocalyptic number.

It is an amenable number.

31513536040 is an abundant number, since it is smaller than the sum of its proper divisors (53786275160).

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

31513536040 is a wasteful number, since it uses less digits than its factorization.

31513536040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923634 (or 5923630 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 31513536040 in words is "thirty-one billion, five hundred thirteen million, five hundred thirty-six thousand, forty".