22566223 has 2 divisors, whose sum is σ = 22566224. Its totient is φ = 22566222.

The previous prime is 22566221. The next prime is 22566227. The reversal of 22566223 is 32266522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22566223 - 2¹ = 22566221 is a prime.

Together with 22566221, it forms a pair of twin primes.

It is equal to p_1422586 and since 22566223 and 1422586 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 22566191 and 22566200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22566221) 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, 11283111 + 11283112.

It is an arithmetic number, because the mean of its divisors is an integer number (11283112).

Almost surely, 2^22566223 is an apocalyptic number.

22566223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22566223 is an equidigital number, since it uses as much as digits as its factorization.

22566223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 22566223 is about 4750.3918785717. The cubic root of 22566223 is about 282.5875072841.

The spelling of 22566223 in words is "twenty-two million, five hundred sixty-six thousand, two hundred twenty-three".