22443209 has 6 divisors (see below), whose sum is σ = 22662990. Its totient is φ = 22225536.

The previous prime is 22443139. The next prime is 22443229. The reversal of 22443209 is 90234422.

It can be written as a sum of positive squares in 3 ways, for example, as 6864400 + 15578809 = 2620^2 + 3947^2 .

It is not a de Polignac number, because 22443209 - 2²⁴ = 5665993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22443229) 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 in 5 ways as a sum of consecutive naturals, for example, 10937 + ... + 12825.

It is an arithmetic number, because the mean of its divisors is an integer number (3777165).

Almost surely, 2^22443209 is an apocalyptic number.

It is an amenable number.

22443209 is a deficient number, since it is larger than the sum of its proper divisors (219781).

22443209 is an equidigital number, since it uses as much as digits as its factorization.

22443209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 1998 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22443209 is about 4737.4264110380. The cubic root of 22443209 is about 282.0730868691.

The spelling of 22443209 in words is "twenty-two million, four hundred forty-three thousand, two hundred nine".