218972055 has 16 divisors (see below), whose sum is σ = 368795520. Its totient is φ = 110638368.

The previous prime is 218972027. The next prime is 218972059. The reversal of 218972055 is 550279812.

It is not a de Polignac number, because 218972055 - 2⁷ = 218971927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218972059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383877 + ... + 384446.

It is an arithmetic number, because the mean of its divisors is an integer number (23049720).

Almost surely, 2^218972055 is an apocalyptic number.

218972055 is a deficient number, since it is larger than the sum of its proper divisors (149823465).

218972055 is a wasteful number, since it uses less digits than its factorization.

218972055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768350.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 218972055 is about 14797.7043827751. The cubic root of 218972055 is about 602.7393767686.

The spelling of 218972055 in words is "two hundred eighteen million, nine hundred seventy-two thousand, fifty-five".