22211009 has 2 divisors, whose sum is σ = 22211010. Its totient is φ = 22211008.

The previous prime is 22211003. The next prime is 22211041. The reversal of 22211009 is 90011222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22137025 + 73984 = 4705^2 + 272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22211009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22211003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105504 + 11105505.

It is an arithmetic number, because the mean of its divisors is an integer number (11105505).

Almost surely, 2^22211009 is an apocalyptic number.

It is an amenable number.

22211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211009 is an equidigital number, since it uses as much as digits as its factorization.

22211009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 22211009 is about 4712.8557160176. The cubic root of 22211009 is about 281.0969258217.

The spelling of 22211009 in words is "twenty-two million, two hundred eleven thousand, nine".