218225288 has 32 divisors (see below), whose sum is σ = 437391360. Its totient is φ = 101819520.

The previous prime is 218225263. The next prime is 218225291. The reversal of 218225288 is 882522812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6920 + ... + 22007.

It is an arithmetic number, because the mean of its divisors is an integer number (13668480).

Almost surely, 2^218225288 is an apocalyptic number.

It is an amenable number.

218225288 is an abundant number, since it is smaller than the sum of its proper divisors (219166072).

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

218225288 is a wasteful number, since it uses less digits than its factorization.

218225288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28997 (or 28993 counting only the distinct ones).

The product of its digits is 40960, while the sum is 38.

The square root of 218225288 is about 14772.4503045365. The cubic root of 218225288 is about 602.0534163041.

The spelling of 218225288 in words is "two hundred eighteen million, two hundred twenty-five thousand, two hundred eighty-eight".