31780452925 has 24 divisors (see below), whose sum is σ = 42469859880. Its totient is φ = 23451648000.

The previous prime is 31780452889. The next prime is 31780452967. The reversal of 31780452925 is 52925408713.

It can be written as a sum of positive squares in 12 ways, for example, as 21975690564 + 9804762361 = 148242^2 + 99019^2 .

It is not a de Polignac number, because 31780452925 - 2⁷ = 31780452797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423225 + ... + 492625.

It is an arithmetic number, because the mean of its divisors is an integer number (1769577495).

Almost surely, 2^31780452925 is an apocalyptic number.

It is an amenable number.

31780452925 is a deficient number, since it is larger than the sum of its proper divisors (10689406955).

31780452925 is a wasteful number, since it uses less digits than its factorization.

31780452925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70833 (or 70828 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 31780452925 in words is "thirty-one billion, seven hundred eighty million, four hundred fifty-two thousand, nine hundred twenty-five".