218241284 has 12 divisors (see below), whose sum is σ = 384838608. Its totient is φ = 108287400.

The previous prime is 218241253. The next prime is 218241299. The reversal of 218241284 is 482142812.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 218241284.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207722 + ... + 208769.

It is an arithmetic number, because the mean of its divisors is an integer number (32069884).

Almost surely, 2^218241284 is an apocalyptic number.

It is an amenable number.

218241284 is a deficient number, since it is larger than the sum of its proper divisors (166597324).

218241284 is a wasteful number, since it uses less digits than its factorization.

218241284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416626 (or 416624 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 218241284 is about 14772.9917078431. The cubic root of 218241284 is about 602.0681261959.

The spelling of 218241284 in words is "two hundred eighteen million, two hundred forty-one thousand, two hundred eighty-four".