11563231 has 2 divisors, whose sum is σ = 11563232. Its totient is φ = 11563230.

The previous prime is 11563193. The next prime is 11563241. The reversal of 11563231 is 13236511.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13236511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11563231 is a prime.

It is a super-2 number, since 2×11563231² = 267416622318722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11563241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5781615 + 5781616.

It is an arithmetic number, because the mean of its divisors is an integer number (5781616).

Almost surely, 2^11563231 is an apocalyptic number.

11563231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11563231 is an equidigital number, since it uses as much as digits as its factorization.

11563231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 11563231 is about 3400.4751138628. The cubic root of 11563231 is about 226.1308076640.

Adding to 11563231 its reverse (13236511), we get a palindrome (24799742).

The spelling of 11563231 in words is "eleven million, five hundred sixty-three thousand, two hundred thirty-one".