22730209 has 2 divisors, whose sum is σ = 22730210. Its totient is φ = 22730208.

The previous prime is 22730177. The next prime is 22730221. The reversal of 22730209 is 90203722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17766225 + 4963984 = 4215^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 22730209 - 2⁵ = 22730177 is a prime.

It is not a weakly prime, because it can be changed into another prime (22730249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11365104 + 11365105.

It is an arithmetic number, because the mean of its divisors is an integer number (11365105).

Almost surely, 2^22730209 is an apocalyptic number.

It is an amenable number.

22730209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22730209 is an equidigital number, since it uses as much as digits as its factorization.

22730209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 22730209 is about 4767.6208951635. The cubic root of 22730209 is about 283.2703655535.

The spelling of 22730209 in words is "twenty-two million, seven hundred thirty thousand, two hundred nine".