22265209 has 2 divisors, whose sum is σ = 22265210. Its totient is φ = 22265208.

The previous prime is 22265203. The next prime is 22265213. The reversal of 22265209 is 90256222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14227984 + 8037225 = 3772^2 + 2835^2 .

It is a cyclic number.

It is not a de Polignac number, because 22265209 - 2²³ = 13876601 is a prime.

It is not a weakly prime, because it can be changed into another prime (22265203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11132604 + 11132605.

It is an arithmetic number, because the mean of its divisors is an integer number (11132605).

Almost surely, 2^22265209 is an apocalyptic number.

It is an amenable number.

22265209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22265209 is an equidigital number, since it uses as much as digits as its factorization.

22265209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22265209 is about 4718.6024414015. The cubic root of 22265209 is about 281.3253872644.

The spelling of 22265209 in words is "twenty-two million, two hundred sixty-five thousand, two hundred nine".