22772209 has 2 divisors, whose sum is σ = 22772210. Its totient is φ = 22772208.

The previous prime is 22772173. The next prime is 22772213. The reversal of 22772209 is 90227722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22771984 + 225 = 4772^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 22772209 - 2⁷ = 22772081 is a prime.

It is not a weakly prime, because it can be changed into another prime (22772219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11386104 + 11386105.

It is an arithmetic number, because the mean of its divisors is an integer number (11386105).

Almost surely, 2^22772209 is an apocalyptic number.

It is an amenable number.

22772209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22772209 is an equidigital number, since it uses as much as digits as its factorization.

22772209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 22772209 is about 4772.0235749627. The cubic root of 22772209 is about 283.4447302069. Note that the first 3 decimals are identical.

The spelling of 22772209 in words is "twenty-two million, seven hundred seventy-two thousand, two hundred nine".