22005449 has 2 divisors, whose sum is σ = 22005450. Its totient is φ = 22005448.

The previous prime is 22005419. The next prime is 22005499. The reversal of 22005449 is 94450022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 5031049 = 4120^2 + 2243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22005449 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 (22005419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002724 + 11002725.

It is an arithmetic number, because the mean of its divisors is an integer number (11002725).

Almost surely, 2^22005449 is an apocalyptic number.

It is an amenable number.

22005449 is a deficient number, since it is larger than the sum of its proper divisors (1).

22005449 is an equidigital number, since it uses as much as digits as its factorization.

22005449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22005449 is about 4690.9965892121. The cubic root of 22005449 is about 280.2270649624.

The spelling of 22005449 in words is "twenty-two million, five thousand, four hundred forty-nine".