218213000 has 32 divisors (see below), whose sum is σ = 510620760. Its totient is φ = 87284800.

The previous prime is 218212991. The next prime is 218213027. The reversal of 218213000 is 312812.

It can be written as a sum of positive squares in 4 ways, for example, as 119290084 + 98922916 = 10922^2 + 9946^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 218213000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108107 + ... + 110106.

Almost surely, 2^218213000 is an apocalyptic number.

218213000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218213000 is an abundant number, since it is smaller than the sum of its proper divisors (292407760).

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

218213000 is a wasteful number, since it uses less digits than its factorization.

218213000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218234 (or 218220 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 218213000 is about 14772.0343893453. The cubic root of 218213000 is about 602.0421157939.

Adding to 218213000 its reverse (312812), we get a palindrome (218525812).

The spelling of 218213000 in words is "two hundred eighteen million, two hundred thirteen thousand".