1113443231 has 4 divisors (see below), whose sum is σ = 1128695952. Its totient is φ = 1098190512.

The previous prime is 1113443209. The next prime is 1113443249. The reversal of 1113443231 is 1323443111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113443231 is a prime.

It is a super-2 number, since 2×1113443231² = 2479511657319438722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113443197 and 1113443206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113443831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7626251 + ... + 7626396.

It is an arithmetic number, because the mean of its divisors is an integer number (282173988).

Almost surely, 2^1113443231 is an apocalyptic number.

1113443231 is a deficient number, since it is larger than the sum of its proper divisors (15252721).

1113443231 is an equidigital number, since it uses as much as digits as its factorization.

1113443231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15252720.

The product of its digits is 864, while the sum is 23.

The square root of 1113443231 is about 33368.2967950119. The cubic root of 1113443231 is about 1036.4683061274.

Adding to 1113443231 its reverse (1323443111), we get a palindrome (2436886342).

The spelling of 1113443231 in words is "one billion, one hundred thirteen million, four hundred forty-three thousand, two hundred thirty-one".