218841189 has 8 divisors (see below), whose sum is σ = 333472320. Its totient is φ = 125052096.

The previous prime is 218841173. The next prime is 218841191. The reversal of 218841189 is 981148812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 218841189 - 2⁴ = 218841173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218841189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218841169) by changing a digit.

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, 5210484 + ... + 5210525.

It is an arithmetic number, because the mean of its divisors is an integer number (41684040).

Almost surely, 2^218841189 is an apocalyptic number.

It is an amenable number.

218841189 is a deficient number, since it is larger than the sum of its proper divisors (114631131).

218841189 is a wasteful number, since it uses less digits than its factorization.

218841189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421019.

The product of its digits is 36864, while the sum is 42.

The square root of 218841189 is about 14793.2818873974. The cubic root of 218841189 is about 602.6192795412.

The spelling of 218841189 in words is "two hundred eighteen million, eight hundred forty-one thousand, one hundred eighty-nine".