22591241 has 2 divisors, whose sum is σ = 22591242. Its totient is φ = 22591240.

The previous prime is 22591213. The next prime is 22591243. The reversal of 22591241 is 14219522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 3625216 = 4355^2 + 1904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22591241 is a prime.

Together with 22591243, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1424087 and since 22591241 and 1424087 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22591241.

It is not a weakly prime, because it can be changed into another prime (22591243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11295620 + 11295621.

It is an arithmetic number, because the mean of its divisors is an integer number (11295621).

Almost surely, 2^22591241 is an apocalyptic number.

It is an amenable number.

22591241 is a deficient number, since it is larger than the sum of its proper divisors (1).

22591241 is an equidigital number, since it uses as much as digits as its factorization.

22591241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 22591241 is about 4753.0244055759. The cubic root of 22591241 is about 282.6918987491.

The spelling of 22591241 in words is "twenty-two million, five hundred ninety-one thousand, two hundred forty-one".