22290509 has 2 divisors, whose sum is σ = 22290510. Its totient is φ = 22290508.

The previous prime is 22290497. The next prime is 22290529. The reversal of 22290509 is 90509222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18088009 + 4202500 = 4253^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 22290509 - 2¹⁶ = 22224973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22290529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11145254 + 11145255.

It is an arithmetic number, because the mean of its divisors is an integer number (11145255).

Almost surely, 2^22290509 is an apocalyptic number.

It is an amenable number.

22290509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22290509 is an equidigital number, since it uses as much as digits as its factorization.

22290509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 22290509 is about 4721.2825587969. The cubic root of 22290509 is about 281.4319037899.

The spelling of 22290509 in words is "twenty-two million, two hundred ninety thousand, five hundred nine".