22550291 has 2 divisors, whose sum is σ = 22550292. Its totient is φ = 22550290.

The previous prime is 22550267. The next prime is 22550303. The reversal of 22550291 is 19205522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22550291 is a 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 22550291.

It is not a weakly prime, because it can be changed into another prime (22550251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275145 + 11275146.

It is an arithmetic number, because the mean of its divisors is an integer number (11275146).

Almost surely, 2^22550291 is an apocalyptic number.

22550291 is a deficient number, since it is larger than the sum of its proper divisors (1).

22550291 is an equidigital number, since it uses as much as digits as its factorization.

22550291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 22550291 is about 4748.7146682023. The cubic root of 22550291 is about 282.5209883380.

The spelling of 22550291 in words is "twenty-two million, five hundred fifty thousand, two hundred ninety-one".