31088112 has 80 divisors (see below), whose sum is σ = 88660992. Its totient is φ = 9308160.

The previous prime is 31088081. The next prime is 31088117. The reversal of 31088112 is 21188013.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31088117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50913 + ... + 51519.

Almost surely, 2^31088112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31088112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44330496).

31088112 is an abundant number, since it is smaller than the sum of its proper divisors (57572880).

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

31088112 is a wasteful number, since it uses less digits than its factorization.

31088112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 31088112 is about 5575.6714393874. The cubic root of 31088112 is about 314.4354109381.

Subtracting from 31088112 its reverse (21188013), we obtain a palindrome (9900099).

The spelling of 31088112 in words is "thirty-one million, eighty-eight thousand, one hundred twelve".