22022591 has 2 divisors, whose sum is σ = 22022592. Its totient is φ = 22022590.

The previous prime is 22022573. The next prime is 22022597. The reversal of 22022591 is 19522022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22022591 - 2¹⁰ = 22021567 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22022597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11011295 + 11011296.

It is an arithmetic number, because the mean of its divisors is an integer number (11011296).

Almost surely, 2^22022591 is an apocalyptic number.

22022591 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022591 is an equidigital number, since it uses as much as digits as its factorization.

22022591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 22022591 is about 4692.8233506068. The cubic root of 22022591 is about 280.2998106652.

The spelling of 22022591 in words is "twenty-two million, twenty-two thousand, five hundred ninety-one".