31113112 has 16 divisors (see below), whose sum is σ = 60873840. Its totient is φ = 14880096.

The previous prime is 31113109. The next prime is 31113113. The reversal of 31113112 is 21131113.

It is a junction number, because it is equal to n+sod(n) for n = 31113092 and 31113101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113113) 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, 84363 + ... + 84730.

It is an arithmetic number, because the mean of its divisors is an integer number (3804615).

Almost surely, 2^31113112 is an apocalyptic number.

It is an amenable number.

31113112 is a deficient number, since it is larger than the sum of its proper divisors (29760728).

31113112 is a wasteful number, since it uses less digits than its factorization.

31113112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169122 (or 169118 counting only the distinct ones).

The product of its digits is 18, while the sum is 13.

The square root of 31113112 is about 5577.9128713167. The cubic root of 31113112 is about 314.5196744348.

Adding to 31113112 its reverse (21131113), we get a palindrome (52244225).

The spelling of 31113112 in words is "thirty-one million, one hundred thirteen thousand, one hundred twelve".