22256081 has 2 divisors, whose sum is σ = 22256082. Its totient is φ = 22256080.

The previous prime is 22256063. The next prime is 22256099. The reversal of 22256081 is 18065222.

It is a balanced prime because it is at equal distance from previous prime (22256063) and next prime (22256099).

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 7929856 = 3785^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 22256081 - 2¹⁴ = 22239697 is a prime.

It is a super-2 number, since 2×22256081² = 990666282957122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1404296 and since 22256081 and 1404296 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22256081.

It is not a weakly prime, because it can be changed into another prime (22253081) 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, 11128040 + 11128041.

It is an arithmetic number, because the mean of its divisors is an integer number (11128041).

Almost surely, 2^22256081 is an apocalyptic number.

It is an amenable number.

22256081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22256081 is an equidigital number, since it uses as much as digits as its factorization.

22256081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 22256081 is about 4717.6351067034. The cubic root of 22256081 is about 281.2869373051.

The spelling of 22256081 in words is "twenty-two million, two hundred fifty-six thousand, eighty-one".