22243391 has 2 divisors, whose sum is σ = 22243392. Its totient is φ = 22243390.

The previous prime is 22243387. The next prime is 22243393. The reversal of 22243391 is 19334222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22243391 - 2² = 22243387 is a prime.

Together with 22243393, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22243391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22243393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11121695 + 11121696.

It is an arithmetic number, because the mean of its divisors is an integer number (11121696).

Almost surely, 2^22243391 is an apocalyptic number.

22243391 is a deficient number, since it is larger than the sum of its proper divisors (1).

22243391 is an equidigital number, since it uses as much as digits as its factorization.

22243391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

The square root of 22243391 is about 4716.2899613997. The cubic root of 22243391 is about 281.2334656288.

The spelling of 22243391 in words is "twenty-two million, two hundred forty-three thousand, three hundred ninety-one".