22538849 has 2 divisors, whose sum is σ = 22538850. Its totient is φ = 22538848.

The previous prime is 22538843. The next prime is 22538851. The reversal of 22538849 is 94883522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17698849 + 4840000 = 4207^2 + 2200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22538849 is a prime.

Together with 22538851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22538843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11269424 + 11269425.

It is an arithmetic number, because the mean of its divisors is an integer number (11269425).

Almost surely, 2^22538849 is an apocalyptic number.

It is an amenable number.

22538849 is a deficient number, since it is larger than the sum of its proper divisors (1).

22538849 is an equidigital number, since it uses as much as digits as its factorization.

22538849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 22538849 is about 4747.5097682891. The cubic root of 22538849 is about 282.4731966112.

The spelling of 22538849 in words is "twenty-two million, five hundred thirty-eight thousand, eight hundred forty-nine".