218945000 has 40 divisors (see below), whose sum is σ = 512999850. Its totient is φ = 87576000.

The previous prime is 218944997. The next prime is 218945039. The reversal of 218945000 is 549812.

218945000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 19061956 + 199883044 = 4366^2 + 14138^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16895 + ... + 26894.

Almost surely, 2^218945000 is an apocalyptic number.

218945000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218945000 is an abundant number, since it is smaller than the sum of its proper divisors (294054850).

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

218945000 is an equidigital number, since it uses as much as digits as its factorization.

218945000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43815 (or 43796 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 218945000 is about 14796.7901924708. The cubic root of 218945000 is about 602.7145520096.

The spelling of 218945000 in words is "two hundred eighteen million, nine hundred forty-five thousand".