31857403425 has 48 divisors (see below), whose sum is σ = 54598410240. Its totient is φ = 16373448000.

The previous prime is 31857403387. The next prime is 31857403427. The reversal of 31857403425 is 52430475813.

It is not a de Polignac number, because 31857403425 - 2⁷ = 31857403297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31857403427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 527010 + ... + 584340.

It is an arithmetic number, because the mean of its divisors is an integer number (1137466880).

Almost surely, 2^31857403425 is an apocalyptic number.

It is an amenable number.

31857403425 is a deficient number, since it is larger than the sum of its proper divisors (22741006815).

31857403425 is a wasteful number, since it uses less digits than its factorization.

31857403425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57614 (or 57609 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 31857403425 in words is "thirty-one billion, eight hundred fifty-seven million, four hundred three thousand, four hundred twenty-five".