22736231 has 4 divisors (see below), whose sum is σ = 25984272. Its totient is φ = 19488192.

The previous prime is 22736209. The next prime is 22736239. The reversal of 22736231 is 13263722.

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 22736231 - 2¹⁸ = 22474087 is a prime.

It is a super-2 number, since 2×22736231² = 1033872400170722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22736231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22736239) 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, 1624010 + ... + 1624023.

It is an arithmetic number, because the mean of its divisors is an integer number (6496068).

Almost surely, 2^22736231 is an apocalyptic number.

22736231 is a deficient number, since it is larger than the sum of its proper divisors (3248041).

22736231 is an equidigital number, since it uses as much as digits as its factorization.

22736231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248040.

The product of its digits is 3024, while the sum is 26.

The square root of 22736231 is about 4768.2524052319. The cubic root of 22736231 is about 283.2953793067.

Adding to 22736231 its reverse (13263722), we get a palindrome (35999953).

The spelling of 22736231 in words is "twenty-two million, seven hundred thirty-six thousand, two hundred thirty-one".