22055281 has 2 divisors, whose sum is σ = 22055282. Its totient is φ = 22055280.

The previous prime is 22055249. The next prime is 22055309. The reversal of 22055281 is 18255022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 152881 = 4680^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 22055281 - 2⁵ = 22055249 is a prime.

It is a super-2 number, since 2×22055281² = 972870839977922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22055981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11027640 + 11027641.

It is an arithmetic number, because the mean of its divisors is an integer number (11027641).

Almost surely, 2^22055281 is an apocalyptic number.

It is an amenable number.

22055281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22055281 is an equidigital number, since it uses as much as digits as its factorization.

22055281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 22055281 is about 4696.3050369413. The cubic root of 22055281 is about 280.4384330271.

The spelling of 22055281 in words is "twenty-two million, fifty-five thousand, two hundred eighty-one".