22845281 has 2 divisors, whose sum is σ = 22845282. Its totient is φ = 22845280.

The previous prime is 22845271. The next prime is 22845283. The reversal of 22845281 is 18254822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 2739025 = 4484^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 22845281 - 2²² = 18650977 is a prime.

It is a super-2 number, since 2×22845281² = 1043813727937922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 22845283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22845283) 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, 11422640 + 11422641.

It is an arithmetic number, because the mean of its divisors is an integer number (11422641).

Almost surely, 2^22845281 is an apocalyptic number.

It is an amenable number.

22845281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22845281 is an equidigital number, since it uses as much as digits as its factorization.

22845281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 32.

The square root of 22845281 is about 4779.6737336350. The cubic root of 22845281 is about 283.7475812120.

The spelling of 22845281 in words is "twenty-two million, eight hundred forty-five thousand, two hundred eighty-one".