218530214 has 32 divisors (see below), whose sum is σ = 393735936. Its totient is φ = 88996320.

The previous prime is 218530187. The next prime is 218530217. The reversal of 218530214 is 412035812.

218530214 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218530217) 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 15 ways as a sum of consecutive naturals, for example, 17369 + ... + 27179.

It is an arithmetic number, because the mean of its divisors is an integer number (12304248).

Almost surely, 2^218530214 is an apocalyptic number.

218530214 is a deficient number, since it is larger than the sum of its proper divisors (175205722).

218530214 is a wasteful number, since it uses less digits than its factorization.

218530214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9900.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 218530214 is about 14782.7674675617. The cubic root of 218530214 is about 602.3337020305. Note that the first 3 decimals are identical.

The spelling of 218530214 in words is "two hundred eighteen million, five hundred thirty thousand, two hundred fourteen".