22139591 has 2 divisors, whose sum is σ = 22139592. Its totient is φ = 22139590.

The previous prime is 22139581. The next prime is 22139599. The reversal of 22139591 is 19593122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22139591 - 2⁶ = 22139527 is a prime.

It is a super-2 number, since 2×22139591² = 980322979294562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22139599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11069795 + 11069796.

It is an arithmetic number, because the mean of its divisors is an integer number (11069796).

Almost surely, 2^22139591 is an apocalyptic number.

22139591 is a deficient number, since it is larger than the sum of its proper divisors (1).

22139591 is an equidigital number, since it uses as much as digits as its factorization.

22139591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 22139591 is about 4705.2726807274. The cubic root of 22139591 is about 280.7953195961.

The spelling of 22139591 in words is "twenty-two million, one hundred thirty-nine thousand, five hundred ninety-one".