31857564134 has 24 divisors (see below), whose sum is σ = 52711203720. Its totient is φ = 14429511360.

The previous prime is 31857564131. The next prime is 31857564143. The reversal of 31857564134 is 43146575813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31857564131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164099 + ... + 301070.

It is an arithmetic number, because the mean of its divisors is an integer number (2196300155).

Almost surely, 2^31857564134 is an apocalyptic number.

31857564134 is a deficient number, since it is larger than the sum of its proper divisors (20853639586).

31857564134 is a wasteful number, since it uses less digits than its factorization.

31857564134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465476 (or 465465 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 47.

The spelling of 31857564134 in words is "thirty-one billion, eight hundred fifty-seven million, five hundred sixty-four thousand, one hundred thirty-four".