22866257 has 2 divisors, whose sum is σ = 22866258. Its totient is φ = 22866256.

The previous prime is 22866227. The next prime is 22866271. The reversal of 22866257 is 75266822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 2876416 = 4471^2 + 1696^2 .

It is a cyclic number.

It is not a de Polignac number, because 22866257 - 2⁸ = 22866001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22866257.

It is not a weakly prime, because it can be changed into another prime (22866227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11433128 + 11433129.

It is an arithmetic number, because the mean of its divisors is an integer number (11433129).

Almost surely, 2^22866257 is an apocalyptic number.

It is an amenable number.

22866257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22866257 is an equidigital number, since it uses as much as digits as its factorization.

22866257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 22866257 is about 4781.8675222135. The cubic root of 22866257 is about 283.8343980993.

The spelling of 22866257 in words is "twenty-two million, eight hundred sixty-six thousand, two hundred fifty-seven".