22548209 has 2 divisors, whose sum is σ = 22548210. Its totient is φ = 22548208.

The previous prime is 22548187. The next prime is 22548221. The reversal of 22548209 is 90284522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13667809 + 8880400 = 3697^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 22548209 - 2²⁴ = 5770993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22548509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11274104 + 11274105.

It is an arithmetic number, because the mean of its divisors is an integer number (11274105).

Almost surely, 2^22548209 is an apocalyptic number.

It is an amenable number.

22548209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22548209 is an equidigital number, since it uses as much as digits as its factorization.

22548209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 22548209 is about 4748.4954459281. The cubic root of 22548209 is about 282.5122933017.

The spelling of 22548209 in words is "twenty-two million, five hundred forty-eight thousand, two hundred nine".