218241814 has 8 divisors (see below), whose sum is σ = 374128848. Its totient is φ = 93532200.

The previous prime is 218241797. The next prime is 218241817. The reversal of 218241814 is 418142812.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218241817) 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 3 ways as a sum of consecutive naturals, for example, 7794337 + ... + 7794364.

It is an arithmetic number, because the mean of its divisors is an integer number (46766106).

Almost surely, 2^218241814 is an apocalyptic number.

218241814 is a deficient number, since it is larger than the sum of its proper divisors (155887034).

218241814 is a wasteful number, since it uses less digits than its factorization.

218241814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15588710.

The product of its digits is 4096, while the sum is 31.

The square root of 218241814 is about 14773.0096459726. The cubic root of 218241814 is about 602.0686135706.

The spelling of 218241814 in words is "two hundred eighteen million, two hundred forty-one thousand, eight hundred fourteen".