22022009 has 2 divisors, whose sum is σ = 22022010. Its totient is φ = 22022008.

The previous prime is 22021981. The next prime is 22022023. The reversal of 22022009 is 90022022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 1951609 = 4480^2 + 1397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22022009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22022069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11011004 + 11011005.

It is an arithmetic number, because the mean of its divisors is an integer number (11011005).

Almost surely, 2^22022009 is an apocalyptic number.

It is an amenable number.

22022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022009 is an equidigital number, since it uses as much as digits as its factorization.

22022009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 22022009 is about 4692.7613406181. The cubic root of 22022009 is about 280.2973414442.

The spelling of 22022009 in words is "twenty-two million, twenty-two thousand, nine".