22005559 has 2 divisors, whose sum is σ = 22005560. Its totient is φ = 22005558.

The previous prime is 22005539. The next prime is 22005569. The reversal of 22005559 is 95550022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22005559 - 2²¹ = 19908407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22005509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002779 + 11002780.

It is an arithmetic number, because the mean of its divisors is an integer number (11002780).

Almost surely, 2^22005559 is an apocalyptic number.

22005559 is a deficient number, since it is larger than the sum of its proper divisors (1).

22005559 is an equidigital number, since it uses as much as digits as its factorization.

22005559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 22005559 is about 4691.0083137850. The cubic root of 22005559 is about 280.2275318911.

The spelling of 22005559 in words is "twenty-two million, five thousand, five hundred fifty-nine".