22450391 has 2 divisors, whose sum is σ = 22450392. Its totient is φ = 22450390.

The previous prime is 22450367. The next prime is 22450397. The reversal of 22450391 is 19305422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22450391 - 2¹⁴ = 22434007 is a prime.

It is a Sophie Germain prime.

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 22450391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22450397) 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, 11225195 + 11225196.

It is an arithmetic number, because the mean of its divisors is an integer number (11225196).

Almost surely, 2^22450391 is an apocalyptic number.

22450391 is a deficient number, since it is larger than the sum of its proper divisors (1).

22450391 is an equidigital number, since it uses as much as digits as its factorization.

22450391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22450391 is about 4738.1843569030. The cubic root of 22450391 is about 282.1031721814.

The spelling of 22450391 in words is "twenty-two million, four hundred fifty thousand, three hundred ninety-one".