20225216 has 28 divisors (see below), whose sum is σ = 43784520. Its totient is φ = 9192960.

The previous prime is 20225213. The next prime is 20225243. The reversal of 20225216 is 61252202.

It is not an unprimeable number, because it can be changed into a prime (20225213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13661 + ... + 15068.

Almost surely, 2^20225216 is an apocalyptic number.

It is an amenable number.

20225216 is an abundant number, since it is smaller than the sum of its proper divisors (23559304).

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

20225216 is a wasteful number, since it uses less digits than its factorization.

20225216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28752 (or 28742 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20225216 is about 4497.2453791182. The cubic root of 20225216 is about 272.4568447217.

Adding to 20225216 its reverse (61252202), we get a palindrome (81477418).

The spelling of 20225216 in words is "twenty million, two hundred twenty-five thousand, two hundred sixteen".