22727231 has 2 divisors, whose sum is σ = 22727232. Its totient is φ = 22727230.

The previous prime is 22727219. The next prime is 22727233. The reversal of 22727231 is 13272722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22727231 - 2¹⁴ = 22710847 is a prime.

It is a super-2 number, since 2×22727231² = 1033054057854722, which contains 22 as substring.

Together with 22727233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22727231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22727233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11363615 + 11363616.

It is an arithmetic number, because the mean of its divisors is an integer number (11363616).

Almost surely, 2^22727231 is an apocalyptic number.

22727231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22727231 is an equidigital number, since it uses as much as digits as its factorization.

22727231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 26.

The square root of 22727231 is about 4767.3085698327. The cubic root of 22727231 is about 283.2579941172.

Adding to 22727231 its reverse (13272722), we get a palindrome (35999953).

The spelling of 22727231 in words is "twenty-two million, seven hundred twenty-seven thousand, two hundred thirty-one".