22521225216 has 448 divisors, whose sum is σ = 73278406656. Its totient is φ = 6016204800.

The previous prime is 22521225203. The next prime is 22521225253. The reversal of 22521225216 is 61252212522.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218652621 + ... + 218652723.

It is an arithmetic number, because the mean of its divisors is an integer number (163567872).

Almost surely, 2^22521225216 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 22521225216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36639203328).

22521225216 is an abundant number, since it is smaller than the sum of its proper divisors (50757181440).

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

22521225216 is a wasteful number, since it uses less digits than its factorization.

22521225216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 187 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 22521225216 its reverse (61252212522), we get a palindrome (83773437738).

The spelling of 22521225216 in words is "twenty-two billion, five hundred twenty-one million, two hundred twenty-five thousand, two hundred sixteen".