22208539 has 2 divisors, whose sum is σ = 22208540. Its totient is φ = 22208538.

The previous prime is 22208533. The next prime is 22208567. The reversal of 22208539 is 93580222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22208539 - 2⁵ = 22208507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22208539.

It is not a weakly prime, because it can be changed into another prime (22208533) 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, 11104269 + 11104270.

It is an arithmetic number, because the mean of its divisors is an integer number (11104270).

Almost surely, 2^22208539 is an apocalyptic number.

22208539 is a deficient number, since it is larger than the sum of its proper divisors (1).

22208539 is an equidigital number, since it uses as much as digits as its factorization.

22208539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 22208539 is about 4712.5936595467. The cubic root of 22208539 is about 281.0865055365.

The spelling of 22208539 in words is "twenty-two million, two hundred eight thousand, five hundred thirty-nine".