22442209 has 2 divisors, whose sum is σ = 22442210. Its totient is φ = 22442208.

The previous prime is 22442207. The next prime is 22442219. The reversal of 22442209 is 90224422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 1830609 = 4540^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 22442209 - 2¹ = 22442207 is a prime.

Together with 22442207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22442207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11221104 + 11221105.

It is an arithmetic number, because the mean of its divisors is an integer number (11221105).

Almost surely, 2^22442209 is an apocalyptic number.

It is an amenable number.

22442209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22442209 is an equidigital number, since it uses as much as digits as its factorization.

22442209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 22442209 is about 4737.3208673258. The cubic root of 22442209 is about 282.0688973720.

The spelling of 22442209 in words is "twenty-two million, four hundred forty-two thousand, two hundred nine".