22124909 has 2 divisors, whose sum is σ = 22124910. Its totient is φ = 22124908.

The previous prime is 22124887. The next prime is 22124923. The reversal of 22124909 is 90942122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16024009 + 6100900 = 4003^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 22124909 - 2⁸ = 22124653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22124969) 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, 11062454 + 11062455.

It is an arithmetic number, because the mean of its divisors is an integer number (11062455).

Almost surely, 2^22124909 is an apocalyptic number.

It is an amenable number.

22124909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22124909 is an equidigital number, since it uses as much as digits as its factorization.

22124909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 22124909 is about 4703.7122573559. The cubic root of 22124909 is about 280.7332355143.

The spelling of 22124909 in words is "twenty-two million, one hundred twenty-four thousand, nine hundred nine".