11113231 has 4 divisors (see below), whose sum is σ = 11123200. Its totient is φ = 11103264.

The previous prime is 11113213. The next prime is 11113237. The reversal of 11113231 is 13231111.

11113231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11113231 - 2²¹ = 9016079 is a prime.

It is a super-2 number, since 2×11113231² = 247007806518722, 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 (11113237) 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, 3066 + ... + 5623.

It is an arithmetic number, because the mean of its divisors is an integer number (2780800).

Almost surely, 2^11113231 is an apocalyptic number.

11113231 is a deficient number, since it is larger than the sum of its proper divisors (9969).

11113231 is an equidigital number, since it uses as much as digits as its factorization.

11113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9968.

The product of its digits is 18, while the sum is 13.

The square root of 11113231 is about 3333.6513015011. The cubic root of 11113231 is about 223.1585070264.

Adding to 11113231 its reverse (13231111), we get a palindrome (24344342).

It can be divided in two parts, 111 and 13231, that multiplied together give a palindrome (1468641).

The spelling of 11113231 in words is "eleven million, one hundred thirteen thousand, two hundred thirty-one".