22125816 has 96 divisors (see below), whose sum is σ = 64696320. Its totient is φ = 6811200.

The previous prime is 22125809. The next prime is 22125821. The reversal of 22125816 is 61852122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22125816.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 51121 + ... + 51551.

It is an arithmetic number, because the mean of its divisors is an integer number (673920).

Almost surely, 2^22125816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22125816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32348160).

22125816 is an abundant number, since it is smaller than the sum of its proper divisors (42570504).

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

22125816 is a wasteful number, since it uses less digits than its factorization.

22125816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 490 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 22125816 is about 4703.8086695783. The cubic root of 22125816 is about 280.7370716365.

Adding to 22125816 its reverse (61852122), we get a palindrome (83977938).

The spelling of 22125816 in words is "twenty-two million, one hundred twenty-five thousand, eight hundred sixteen".