22518851 has 2 divisors, whose sum is σ = 22518852. Its totient is φ = 22518850.

The previous prime is 22518823. The next prime is 22518889. The reversal of 22518851 is 15881522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22518851 - 2²² = 18324547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22518451) 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, 11259425 + 11259426.

It is an arithmetic number, because the mean of its divisors is an integer number (11259426).

Almost surely, 2^22518851 is an apocalyptic number.

22518851 is a deficient number, since it is larger than the sum of its proper divisors (1).

22518851 is an equidigital number, since it uses as much as digits as its factorization.

22518851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 32.

The square root of 22518851 is about 4745.4031440964. The cubic root of 22518851 is about 282.3896287457.

The spelling of 22518851 in words is "twenty-two million, five hundred eighteen thousand, eight hundred fifty-one".