31323112 has 32 divisors (see below), whose sum is σ = 62785800. Its totient is φ = 14598144.

The previous prime is 31323107. The next prime is 31323133. The reversal of 31323112 is 21132313.

It can be written as a sum of positive squares in 4 ways, for example, as 23561316 + 7761796 = 4854^2 + 2786^2 .

It is a super-2 number, since 2×31323112² = 1962274690729088, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13768 + ... + 15880.

Almost surely, 2^31323112 is an apocalyptic number.

It is an amenable number.

31323112 is an abundant number, since it is smaller than the sum of its proper divisors (31462688).

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

31323112 is a wasteful number, since it uses less digits than its factorization.

31323112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245 (or 2241 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 31323112 is about 5596.7054594645. The cubic root of 31323112 is about 315.2257120839.

Adding to 31323112 its reverse (21132313), we get a palindrome (52455425).

It can be divided in two parts, 3132311 and 2, that added together give a palindrome (3132313).

The spelling of 31323112 in words is "thirty-one million, three hundred twenty-three thousand, one hundred twelve".