31112112 has 40 divisors (see below), whose sum is σ = 82338480. Its totient is φ = 10117120.

The previous prime is 31112093. The next prime is 31112119. The reversal of 31112112 is 21121113.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is not an unprimeable number, because it can be changed into a prime (31112119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5937 + ... + 9872.

It is an arithmetic number, because the mean of its divisors is an integer number (2058462).

Almost surely, 2^31112112 is an apocalyptic number.

It is an amenable number.

31112112 is an abundant number, since it is smaller than the sum of its proper divisors (51226368).

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

31112112 is a wasteful number, since it uses less digits than its factorization.

31112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861 (or 15855 counting only the distinct ones).

The product of its digits is 12, while the sum is 12.

The square root of 31112112 is about 5577.8232313332. The cubic root of 31112112 is about 314.5163047617.

Adding to 31112112 its reverse (21121113), we get a palindrome (52233225).

Subtracting from 31112112 its reverse (21121113), we obtain a palindrome (9990999).

The spelling of 31112112 in words is "thirty-one million, one hundred twelve thousand, one hundred twelve".