22644551 has 2 divisors, whose sum is σ = 22644552. Its totient is φ = 22644550.

The previous prime is 22644547. The next prime is 22644577. The reversal of 22644551 is 15544622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22644551 - 2² = 22644547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22644521) 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, 11322275 + 11322276.

It is an arithmetic number, because the mean of its divisors is an integer number (11322276).

Almost surely, 2^22644551 is an apocalyptic number.

22644551 is a deficient number, since it is larger than the sum of its proper divisors (1).

22644551 is an equidigital number, since it uses as much as digits as its factorization.

22644551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 22644551 is about 4758.6291093129. The cubic root of 22644551 is about 282.9140861375.

The spelling of 22644551 in words is "twenty-two million, six hundred forty-four thousand, five hundred fifty-one".