31523664325 has 12 divisors (see below), whose sum is σ = 39108192228. Its totient is φ = 25206771200.

The previous prime is 31523664317. The next prime is 31523664331. The reversal of 31523664325 is 52346632513.

It can be written as a sum of positive squares in 6 ways, for example, as 738154561 + 30785509764 = 27169^2 + 175458^2 .

It is not a de Polignac number, because 31523664325 - 2³ = 31523664317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250942 + ... + 354991.

It is an arithmetic number, because the mean of its divisors is an integer number (3259016019).

Almost surely, 2^31523664325 is an apocalyptic number.

It is an amenable number.

31523664325 is a deficient number, since it is larger than the sum of its proper divisors (7584527903).

31523664325 is a wasteful number, since it uses less digits than its factorization.

31523664325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608024 (or 608019 counting only the distinct ones).

The product of its digits is 388800, while the sum is 40.

The spelling of 31523664325 in words is "thirty-one billion, five hundred twenty-three million, six hundred sixty-four thousand, three hundred twenty-five".