31857401852 has 12 divisors (see below), whose sum is σ = 55753185600. Its totient is φ = 15927920256.

The previous prime is 31857401843. The next prime is 31857401881. The reversal of 31857401852 is 25810475813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97973 + ... + 270764.

It is an arithmetic number, because the mean of its divisors is an integer number (4646098800).

Almost surely, 2^31857401852 is an apocalyptic number.

It is an amenable number.

31857401852 is a deficient number, since it is larger than the sum of its proper divisors (23895783748).

31857401852 is a wasteful number, since it uses less digits than its factorization.

31857401852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390340 (or 390338 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 31857401852 in words is "thirty-one billion, eight hundred fifty-seven million, four hundred one thousand, eight hundred fifty-two".