225621416 has 32 divisors (see below), whose sum is σ = 449064000. Its totient is φ = 105904896.

The previous prime is 225621391. The next prime is 225621419. The reversal of 225621416 is 614126522.

It is not an unprimeable number, because it can be changed into a prime (225621419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57815 + ... + 61593.

It is an arithmetic number, because the mean of its divisors is an integer number (14033250).

Almost surely, 2^225621416 is an apocalyptic number.

It is an amenable number.

225621416 is a deficient number, since it is larger than the sum of its proper divisors (223442584).

225621416 is a wasteful number, since it uses less digits than its factorization.

225621416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241 (or 4237 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 225621416 is about 15020.6995842404. The cubic root of 225621416 is about 608.7796222868.

Adding to 225621416 its reverse (614126522), we get a palindrome (839747938).

The spelling of 225621416 in words is "two hundred twenty-five million, six hundred twenty-one thousand, four hundred sixteen".