31885684113 has 16 divisors (see below), whose sum is σ = 43254789056. Its totient is φ = 20887554240.

The previous prime is 31885684099. The next prime is 31885684141. The reversal of 31885684113 is 31148658813.

It is not a de Polignac number, because 31885684113 - 2¹² = 31885680017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31885684013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95070 + ... + 269832.

It is an arithmetic number, because the mean of its divisors is an integer number (2703424316).

Almost surely, 2^31885684113 is an apocalyptic number.

It is an amenable number.

31885684113 is a deficient number, since it is larger than the sum of its proper divisors (11369104943).

31885684113 is a wasteful number, since it uses less digits than its factorization.

31885684113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175824.

The product of its digits is 552960, while the sum is 48.

The spelling of 31885684113 in words is "thirty-one billion, eight hundred eighty-five million, six hundred eighty-four thousand, one hundred thirteen".