22128227 has 4 divisors (see below), whose sum is σ = 24139896. Its totient is φ = 20116560.

The previous prime is 22128193. The next prime is 22128229. The reversal of 22128227 is 72282122.

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

It is a cyclic number.

It is not a de Polignac number, because 22128227 - 2¹² = 22124131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22128196 and 22128205.

It is not an unprimeable number, because it can be changed into a prime (22128229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005818 + ... + 1005839.

It is an arithmetic number, because the mean of its divisors is an integer number (6034974).

Almost surely, 2^22128227 is an apocalyptic number.

22128227 is a deficient number, since it is larger than the sum of its proper divisors (2011669).

22128227 is a wasteful number, since it uses less digits than its factorization.

22128227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011668.

The product of its digits is 1792, while the sum is 26.

The square root of 22128227 is about 4704.0649442796. The cubic root of 22128227 is about 280.7472683602.

The spelling of 22128227 in words is "twenty-two million, one hundred twenty-eight thousand, two hundred twenty-seven".