22591243 has 2 divisors, whose sum is σ = 22591244. Its totient is φ = 22591242.

The previous prime is 22591241. The next prime is 22591273. The reversal of 22591243 is 34219522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22591243 - 2¹ = 22591241 is a prime.

Together with 22591241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22591241) 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, 11295621 + 11295622.

It is an arithmetic number, because the mean of its divisors is an integer number (11295622).

Almost surely, 2^22591243 is an apocalyptic number.

22591243 is a deficient number, since it is larger than the sum of its proper divisors (1).

22591243 is an equidigital number, since it uses as much as digits as its factorization.

22591243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 22591243 is about 4753.0246159682. The cubic root of 22591243 is about 282.6919070913.

The spelling of 22591243 in words is "twenty-two million, five hundred ninety-one thousand, two hundred forty-three".