22123230 has 64 divisors (see below), whose sum is σ = 55987200. Its totient is φ = 5586560.

The previous prime is 22123187. The next prime is 22123237. The reversal of 22123230 is 3232122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123237) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 51115 + ... + 51545.

It is an arithmetic number, because the mean of its divisors is an integer number (874800).

Almost surely, 2^22123230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22123230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27993600).

22123230 is an abundant number, since it is smaller than the sum of its proper divisors (33863970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22123230 is a wasteful number, since it uses less digits than its factorization.

22123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22123230 is about 4703.5337779163. The cubic root of 22123230 is about 280.7261339706.

Adding to 22123230 its reverse (3232122), we get a palindrome (25355352).

The spelling of 22123230 in words is "twenty-two million, one hundred twenty-three thousand, two hundred thirty".