22091539 has 2 divisors, whose sum is σ = 22091540. Its totient is φ = 22091538.

The previous prime is 22091527. The next prime is 22091603. The reversal of 22091539 is 93519022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22091539 - 2⁵ = 22091507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22091539.

It is not a weakly prime, because it can be changed into another prime (22091519) 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, 11045769 + 11045770.

It is an arithmetic number, because the mean of its divisors is an integer number (11045770).

Almost surely, 2^22091539 is an apocalyptic number.

22091539 is a deficient number, since it is larger than the sum of its proper divisors (1).

22091539 is an equidigital number, since it uses as much as digits as its factorization.

22091539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 22091539 is about 4700.1637205527. The cubic root of 22091539 is about 280.5920254144.

The spelling of 22091539 in words is "twenty-two million, ninety-one thousand, five hundred thirty-nine".