22271065 has 4 divisors (see below), whose sum is σ = 26725284. Its totient is φ = 17816848.

The previous prime is 22271027. The next prime is 22271083. The reversal of 22271065 is 56017222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9217296 + 13053769 = 3036^2 + 3613^2 .

It is a cyclic number.

It is not a de Polignac number, because 22271065 - 2¹⁵ = 22238297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2227102 + ... + 2227111.

It is an arithmetic number, because the mean of its divisors is an integer number (6681321).

Almost surely, 2^22271065 is an apocalyptic number.

It is an amenable number.

22271065 is a deficient number, since it is larger than the sum of its proper divisors (4454219).

22271065 is an equidigital number, since it uses as much as digits as its factorization.

22271065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454218.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 22271065 is about 4719.2229233212. Note that the first 3 decimals coincide. The cubic root of 22271065 is about 281.3500490144.

Adding to 22271065 its reverse (56017222), we get a palindrome (78288287).

The spelling of 22271065 in words is "twenty-two million, two hundred seventy-one thousand, sixty-five".