22128017 has 4 divisors (see below), whose sum is σ = 22841856. Its totient is φ = 21414180.

The previous prime is 22128013. The next prime is 22128019. The reversal of 22128017 is 71082122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71082122 = 2 ⋅35541061.

It is not a de Polignac number, because 22128017 - 2² = 22128013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22127983 and 22128001.

It is not an unprimeable number, because it can be changed into a prime (22128011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356873 + ... + 356934.

It is an arithmetic number, because the mean of its divisors is an integer number (5710464).

Almost surely, 2^22128017 is an apocalyptic number.

It is an amenable number.

22128017 is a deficient number, since it is larger than the sum of its proper divisors (713839).

22128017 is an equidigital number, since it uses as much as digits as its factorization.

22128017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713838.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 22128017 is about 4704.0426231062. The cubic root of 22128017 is about 280.7463802470.

The spelling of 22128017 in words is "twenty-two million, one hundred twenty-eight thousand, seventeen".