31752740725 has 12 divisors (see below), whose sum is σ = 39573269604. Its totient is φ = 25273243520.

The previous prime is 31752740717. The next prime is 31752740749. The reversal of 31752740725 is 52704725713.

It can be written as a sum of positive squares in 6 ways, for example, as 4943917969 + 26808822756 = 70313^2 + 163734^2 .

It is not a de Polignac number, because 31752740725 - 2³ = 31752740717 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, 3218704 + ... + 3228553.

It is an arithmetic number, because the mean of its divisors is an integer number (3297772467).

Almost surely, 2^31752740725 is an apocalyptic number.

It is an amenable number.

31752740725 is a deficient number, since it is larger than the sum of its proper divisors (7820528879).

31752740725 is a wasteful number, since it uses less digits than its factorization.

31752740725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447464 (or 6447459 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 43.

The spelling of 31752740725 in words is "thirty-one billion, seven hundred fifty-two million, seven hundred forty thousand, seven hundred twenty-five".