22544387 has 2 divisors, whose sum is σ = 22544388. Its totient is φ = 22544386.

The previous prime is 22544351. The next prime is 22544399. The reversal of 22544387 is 78344522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22544387 - 2¹⁸ = 22282243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22544287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11272193 + 11272194.

It is an arithmetic number, because the mean of its divisors is an integer number (11272194).

Almost surely, 2^22544387 is an apocalyptic number.

22544387 is a deficient number, since it is larger than the sum of its proper divisors (1).

22544387 is an equidigital number, since it uses as much as digits as its factorization.

22544387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 35.

The square root of 22544387 is about 4748.0929856101. The cubic root of 22544387 is about 282.4963301270.

The spelling of 22544387 in words is "twenty-two million, five hundred forty-four thousand, three hundred eighty-seven".