113131312 has 80 divisors (see below), whose sum is σ = 258322752. Its totient is φ = 47001600.

The previous prime is 113131297. The next prime is 113131321. The reversal of 113131312 is 213131311.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 825708 + ... + 825844.

Almost surely, 2^113131312 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 113131312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129161376).

113131312 is an abundant number, since it is smaller than the sum of its proper divisors (145191440).

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

113131312 is a wasteful number, since it uses less digits than its factorization.

113131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 113131312 is about 10636.3204163846. The cubic root of 113131312 is about 483.6460084896.

113131312 divided by its sum of digits (16) gives a palindrome (7070707).

Adding to 113131312 its reverse (213131311), we get a palindrome (326262623).

Subtracting 113131312 from its reverse (213131311), we obtain a palindrome (99999999).

The spelling of 113131312 in words is "one hundred thirteen million, one hundred thirty-one thousand, three hundred twelve".