218325808 has 40 divisors (see below), whose sum is σ = 459653120. Its totient is φ = 100077120.

The previous prime is 218325791. The next prime is 218325817. The reversal of 218325808 is 808523812.

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, 2160 + ... + 21007.

It is an arithmetic number, because the mean of its divisors is an integer number (11491328).

Almost surely, 2^218325808 is an apocalyptic number.

It is an amenable number.

218325808 is an abundant number, since it is smaller than the sum of its proper divisors (241327312).

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

218325808 is a wasteful number, since it uses less digits than its factorization.

218325808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23225 (or 23219 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 218325808 is about 14775.8521920057. The cubic root of 218325808 is about 602.1458423778.

The spelling of 218325808 in words is "two hundred eighteen million, three hundred twenty-five thousand, eight hundred eight".