218784055 has 16 divisors (see below), whose sum is σ = 300672000. Its totient is φ = 149710752.

The previous prime is 218784029. The next prime is 218784089. The reversal of 218784055 is 550487812.

It is a cyclic number.

It is not a de Polignac number, because 218784055 - 2⁵ = 218784023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218783999 and 218784017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11202 + ... + 23728.

It is an arithmetic number, because the mean of its divisors is an integer number (18792000).

Almost surely, 2^218784055 is an apocalyptic number.

218784055 is a deficient number, since it is larger than the sum of its proper divisors (81887945).

218784055 is a wasteful number, since it uses less digits than its factorization.

218784055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13038.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 218784055 is about 14791.3506820709. The cubic root of 218784055 is about 602.5668320003.

The spelling of 218784055 in words is "two hundred eighteen million, seven hundred eighty-four thousand, fifty-five".