31128583112 has 16 divisors (see below), whose sum is σ = 63672102000. Its totient is φ = 14149355920.

The previous prime is 31128583103. The next prime is 31128583117. The reversal of 31128583112 is 21138582113.

It is not an unprimeable number, because it can be changed into a prime (31128583117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176866862 + ... + 176867037.

It is an arithmetic number, because the mean of its divisors is an integer number (3979506375).

Almost surely, 2^31128583112 is an apocalyptic number.

It is an amenable number.

31128583112 is an abundant number, since it is smaller than the sum of its proper divisors (32543518888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31128583112 is a wasteful number, since it uses less digits than its factorization.

31128583112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353733916 (or 353733912 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

Subtracting from 31128583112 its reverse (21138582113), we obtain a palindrome (9990000999).

The spelling of 31128583112 in words is "thirty-one billion, one hundred twenty-eight million, five hundred eighty-three thousand, one hundred twelve".