22497287 has 2 divisors, whose sum is σ = 22497288. Its totient is φ = 22497286.

The previous prime is 22497271. The next prime is 22497313. The reversal of 22497287 is 78279422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22497287 - 2⁴ = 22497271 is a prime.

It is a super-2 number, since 2×22497287² = 1012255844720738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22497217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11248643 + 11248644.

It is an arithmetic number, because the mean of its divisors is an integer number (11248644).

Almost surely, 2^22497287 is an apocalyptic number.

22497287 is a deficient number, since it is larger than the sum of its proper divisors (1).

22497287 is an equidigital number, since it uses as much as digits as its factorization.

22497287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 22497287 is about 4743.1305063217. The cubic root of 22497287 is about 282.2994614049.

The spelling of 22497287 in words is "twenty-two million, four hundred ninety-seven thousand, two hundred eighty-seven".