31123112 has 32 divisors (see below), whose sum is σ = 59740200. Its totient is φ = 15197184.

The previous prime is 31123109. The next prime is 31123123. The reversal of 31123112 is 21132113.

It can be written as a sum of positive squares in 4 ways, for example, as 25140196 + 5982916 = 5014^2 + 2446^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79814 + ... + 80202.

Almost surely, 2^31123112 is an apocalyptic number.

It is an amenable number.

31123112 is a deficient number, since it is larger than the sum of its proper divisors (28617088).

31123112 is a wasteful number, since it uses less digits than its factorization.

31123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 601 counting only the distinct ones).

The product of its digits is 36, while the sum is 14.

The square root of 31123112 is about 5578.8091919333. The cubic root of 31123112 is about 314.5533671947.

Adding to 31123112 its reverse (21132113), we get a palindrome (52255225).

Subtracting from 31123112 its reverse (21132113), we obtain a palindrome (9990999).

The spelling of 31123112 in words is "thirty-one million, one hundred twenty-three thousand, one hundred twelve".