22128233 has 4 divisors (see below), whose sum is σ = 22667988. Its totient is φ = 21588480.

The previous prime is 22128229. The next prime is 22128241. The reversal of 22128233 is 33282122.

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 3396649 + 18731584 = 1843^2 + 4328^2 .

It is a cyclic number.

It is not a de Polignac number, because 22128233 - 2² = 22128229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22128199 and 22128208.

It is not an unprimeable number, because it can be changed into a prime (22128283) 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, 269816 + ... + 269897.

It is an arithmetic number, because the mean of its divisors is an integer number (5666997).

Almost surely, 2^22128233 is an apocalyptic number.

It is an amenable number.

22128233 is a deficient number, since it is larger than the sum of its proper divisors (539755).

22128233 is an equidigital number, since it uses as much as digits as its factorization.

22128233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539754.

The product of its digits is 1152, while the sum is 23.

The square root of 22128233 is about 4704.0655820258. The cubic root of 22128233 is about 280.7472937348.

The spelling of 22128233 in words is "twenty-two million, one hundred twenty-eight thousand, two hundred thirty-three".