22245216 has 72 divisors (see below), whose sum is σ = 67941720. Its totient is φ = 6354432.

The previous prime is 22245211. The next prime is 22245227. The reversal of 22245216 is 61254222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22245211) 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 11 ways as a sum of consecutive naturals, for example, 2340 + ... + 7068.

It is an arithmetic number, because the mean of its divisors is an integer number (943635).

Almost surely, 2^22245216 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 22245216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33970860).

22245216 is an abundant number, since it is smaller than the sum of its proper divisors (45696504).

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

22245216 is a wasteful number, since it uses less digits than its factorization.

22245216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756 (or 4741 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 22245216 is about 4716.4834357814. The cubic root of 22245216 is about 281.2411568578.

Adding to 22245216 its reverse (61254222), we get a palindrome (83499438).

The spelling of 22245216 in words is "twenty-two million, two hundred forty-five thousand, two hundred sixteen".