1113431231 has 24 divisors (see below), whose sum is σ = 1250951184. Its totient is φ = 990000000.

The previous prime is 1113431227. The next prime is 1113431237. The reversal of 1113431231 is 1321343111.

It is not a de Polignac number, because 1113431231 - 2² = 1113431227 is a prime.

It is a super-2 number, since 2×1113431231² = 2479458212332350722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113431237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1852331 + ... + 1852931.

It is an arithmetic number, because the mean of its divisors is an integer number (52122966).

Almost surely, 2^1113431231 is an apocalyptic number.

1113431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1113431231 is a deficient number, since it is larger than the sum of its proper divisors (137519953).

1113431231 is a wasteful number, since it uses less digits than its factorization.

1113431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935 (or 924 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 1113431231 is about 33368.1169831323. The cubic root of 1113431231 is about 1036.4645826433.

Adding to 1113431231 its reverse (1321343111), we get a palindrome (2434774342).

The spelling of 1113431231 in words is "one billion, one hundred thirteen million, four hundred thirty-one thousand, two hundred thirty-one".