218814530 has 32 divisors (see below), whose sum is σ = 439674048. Its totient is φ = 77716800.

The previous prime is 218814527. The next prime is 218814551. The reversal of 218814530 is 35418812.

It is an unprimeable number.

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, 18401 + ... + 27860.

It is an arithmetic number, because the mean of its divisors is an integer number (13739814).

Almost surely, 2^218814530 is an apocalyptic number.

218814530 is an abundant number, since it is smaller than the sum of its proper divisors (220859518).

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

218814530 is a wasteful number, since it uses less digits than its factorization.

218814530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46322.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 218814530 is about 14792.3808090517. The cubic root of 218814530 is about 602.5948084018.

The spelling of 218814530 in words is "two hundred eighteen million, eight hundred fourteen thousand, five hundred thirty".