22217789 has 4 divisors (see below), whose sum is σ = 24237600. Its totient is φ = 20197980.

The previous prime is 22217737. The next prime is 22217791. The reversal of 22217789 is 98771222.

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.

It is not a de Polignac number, because 22217789 - 2²⁴ = 5440573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22217719) 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, 1009889 + ... + 1009910.

It is an arithmetic number, because the mean of its divisors is an integer number (6059400).

Almost surely, 2^22217789 is an apocalyptic number.

It is an amenable number.

22217789 is a deficient number, since it is larger than the sum of its proper divisors (2019811).

22217789 is a wasteful number, since it uses less digits than its factorization.

22217789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019810.

The product of its digits is 28224, while the sum is 38.

The square root of 22217789 is about 4713.5749702323. The cubic root of 22217789 is about 281.1255249017.

The spelling of 22217789 in words is "twenty-two million, two hundred seventeen thousand, seven hundred eighty-nine".