221834284 has 12 divisors (see below), whose sum is σ = 443668624. Its totient is φ = 95071824.

The previous prime is 221834273. The next prime is 221834297. The reversal of 221834284 is 482438122.

221834284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

221834284 is an admirable number.

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, 3961299 + ... + 3961354.

Almost surely, 2^221834284 is an apocalyptic number.

It is an amenable number.

221834284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221834284 is a wasteful number, since it uses less digits than its factorization.

221834284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7922664 (or 7922662 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 221834284 is about 14894.1023227316. The cubic root of 221834284 is about 605.3541937099.

The spelling of 221834284 in words is "two hundred twenty-one million, eight hundred thirty-four thousand, two hundred eighty-four".