22305641 has 2 divisors, whose sum is σ = 22305642. Its totient is φ = 22305640.

The previous prime is 22305623. The next prime is 22305643. The reversal of 22305641 is 14650322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 2689600 = 4429^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 22305641 - 2¹⁰ = 22304617 is a prime.

Together with 22305643, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1407209 and since 22305641 and 1407209 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22305643) 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, 11152820 + 11152821.

It is an arithmetic number, because the mean of its divisors is an integer number (11152821).

Almost surely, 2^22305641 is an apocalyptic number.

It is an amenable number.

22305641 is a deficient number, since it is larger than the sum of its proper divisors (1).

22305641 is an equidigital number, since it uses as much as digits as its factorization.

22305641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22305641 is about 4722.8848175665. The cubic root of 22305641 is about 281.4955731042.

Adding to 22305641 its reverse (14650322), we get a palindrome (36955963).

The spelling of 22305641 in words is "twenty-two million, three hundred five thousand, six hundred forty-one".