11564231 has 4 divisors (see below), whose sum is σ = 13216272. Its totient is φ = 9912192.

The previous prime is 11564227. The next prime is 11564237. The reversal of 11564231 is 13246511.

11564231 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.

It is a cyclic number.

It is not a de Polignac number, because 11564231 - 2² = 11564227 is a prime.

It is a super-2 number, since 2×11564231² = 267462877242722, 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 = 11564197 and 11564206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11564237) 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, 826010 + ... + 826023.

It is an arithmetic number, because the mean of its divisors is an integer number (3304068).

Almost surely, 2^11564231 is an apocalyptic number.

11564231 is a deficient number, since it is larger than the sum of its proper divisors (1652041).

11564231 is an equidigital number, since it uses as much as digits as its factorization.

11564231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652040.

The product of its digits is 720, while the sum is 23.

The square root of 11564231 is about 3400.6221489604. The cubic root of 11564231 is about 226.1373261504.

It can be divided in two parts, 115 and 64231, that added together give a palindrome (64346).

The spelling of 11564231 in words is "eleven million, five hundred sixty-four thousand, two hundred thirty-one".