22536391 has 2 divisors, whose sum is σ = 22536392. Its totient is φ = 22536390.

The previous prime is 22536361. The next prime is 22536403. The reversal of 22536391 is 19363522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22536391 - 2⁷ = 22536263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22536361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11268195 + 11268196.

It is an arithmetic number, because the mean of its divisors is an integer number (11268196).

Almost surely, 2^22536391 is an apocalyptic number.

22536391 is a deficient number, since it is larger than the sum of its proper divisors (1).

22536391 is an equidigital number, since it uses as much as digits as its factorization.

22536391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 22536391 is about 4747.2508886723. The cubic root of 22536391 is about 282.4629277585.

The spelling of 22536391 in words is "twenty-two million, five hundred thirty-six thousand, three hundred ninety-one".