221011984 has 20 divisors (see below), whose sum is σ = 428487084. Its totient is φ = 110434688.

The previous prime is 221011943. The next prime is 221011993. The reversal of 221011984 is 489110122.

It can be written as a sum of positive squares in 2 ways, for example, as 59721984 + 161290000 = 7728^2 + 12700^2 .

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, 28494 + ... + 35410.

Almost surely, 2^221011984 is an apocalyptic number.

It is an amenable number.

221011984 is a deficient number, since it is larger than the sum of its proper divisors (207475100).

221011984 is a wasteful number, since it uses less digits than its factorization.

221011984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8922 (or 8916 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 221011984 is about 14866.4718073926. The cubic root of 221011984 is about 604.6052876975.

The spelling of 221011984 in words is "two hundred twenty-one million, eleven thousand, nine hundred eighty-four".