31240691325 has 144 divisors (see below), whose sum is σ = 60632994240. Its totient is φ = 15318927360.

The previous prime is 31240691303. The next prime is 31240691353. The reversal of 31240691325 is 52319604213.

31240691325 is a `hidden beast` number, since 3 + 1 + 240 + 6 + 91 + 325 = 666.

It is not a de Polignac number, because 31240691325 - 2¹⁰ = 31240690301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31240691325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 35621787 + ... + 35622663.

It is an arithmetic number, because the mean of its divisors is an integer number (421062460).

Almost surely, 2^31240691325 is an apocalyptic number.

It is an amenable number.

31240691325 is a deficient number, since it is larger than the sum of its proper divisors (29392302915).

31240691325 is a wasteful number, since it uses less digits than its factorization.

31240691325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 31240691325 in words is "thirty-one billion, two hundred forty million, six hundred ninety-one thousand, three hundred twenty-five".