31232111985 has 24 divisors (see below), whose sum is σ = 54150229224. Its totient is φ = 16652643840.

The previous prime is 31232111983. The next prime is 31232111993. The reversal of 31232111985 is 58911123213.

31232111985 is a `hidden beast` number, since 312 + 321 + 1 + 19 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 520250481 + 30711861504 = 22809^2 + 175248^2 .

It is not a de Polignac number, because 31232111985 - 2¹ = 31232111983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31232111983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79195 + ... + 262175.

It is an arithmetic number, because the mean of its divisors is an integer number (2256259551).

Almost surely, 2^31232111985 is an apocalyptic number.

It is an amenable number.

31232111985 is a deficient number, since it is larger than the sum of its proper divisors (22918117239).

31232111985 is a wasteful number, since it uses less digits than its factorization.

31232111985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186785 (or 186782 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 31232111985 in words is "thirty-one billion, two hundred thirty-two million, one hundred eleven thousand, nine hundred eighty-five".