225583218 has 168 divisors, whose sum is σ = 625161024. Its totient is φ = 59661360.

The previous prime is 225583159. The next prime is 225583229. The reversal of 225583218 is 812385522.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 7276863 + ... + 7276893.

Almost surely, 2^225583218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225583218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312580512).

225583218 is an abundant number, since it is smaller than the sum of its proper divisors (399577806).

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

225583218 is an equidigital number, since it uses as much as digits as its factorization.

225583218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 66 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 225583218 is about 15019.4280184034. The cubic root of 225583218 is about 608.7452646197.

The spelling of 225583218 in words is "two hundred twenty-five million, five hundred eighty-three thousand, two hundred eighteen".