22442281 has 2 divisors, whose sum is σ = 22442282. Its totient is φ = 22442280.

The previous prime is 22442279. The next prime is 22442311. The reversal of 22442281 is 18224422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19501056 + 2941225 = 4416^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 22442281 - 2¹ = 22442279 is a prime.

It is a super-2 number, since 2×22442281² = 1007311952965922, which contains 22 as substring.

Together with 22442279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22442081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11221140 + 11221141.

It is an arithmetic number, because the mean of its divisors is an integer number (11221141).

Almost surely, 2^22442281 is an apocalyptic number.

It is an amenable number.

22442281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22442281 is an equidigital number, since it uses as much as digits as its factorization.

22442281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 25.

The square root of 22442281 is about 4737.3284665516. The cubic root of 22442281 is about 282.0691990200.

The spelling of 22442281 in words is "twenty-two million, four hundred forty-two thousand, two hundred eighty-one".