22403231 has 2 divisors, whose sum is σ = 22403232. Its totient is φ = 22403230.

The previous prime is 22403207. The next prime is 22403233. The reversal of 22403231 is 13230422.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22403231 is a prime.

It is a super-2 number, since 2×22403231² = 1003809518478722, which contains 22 as substring.

Together with 22403233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22403233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11201615 + 11201616.

It is an arithmetic number, because the mean of its divisors is an integer number (11201616).

Almost surely, 2^22403231 is an apocalyptic number.

22403231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22403231 is an equidigital number, since it uses as much as digits as its factorization.

22403231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 22403231 is about 4733.2051508465. The cubic root of 22403231 is about 281.9055020966.

Adding to 22403231 its reverse (13230422), we get a palindrome (35633653).

The spelling of 22403231 in words is "twenty-two million, four hundred three thousand, two hundred thirty-one".