221838884 has 12 divisors (see below), whose sum is σ = 388322844. Its totient is φ = 110889504.

The previous prime is 221838863. The next prime is 221838913. The reversal of 221838884 is 488838122.

It can be written as a sum of positive squares in 2 ways, for example, as 194044900 + 27793984 = 13930^2 + 5272^2 .

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, 22814 + ... + 31050.

It is an arithmetic number, because the mean of its divisors is an integer number (32360237).

Almost surely, 2^221838884 is an apocalyptic number.

It is an amenable number.

221838884 is a deficient number, since it is larger than the sum of its proper divisors (166483960).

221838884 is a wasteful number, since it uses less digits than its factorization.

221838884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14974 (or 14972 counting only the distinct ones).

The product of its digits is 196608, while the sum is 44.

The square root of 221838884 is about 14894.2567454707. The cubic root of 221838884 is about 605.3583779295.

The spelling of 221838884 in words is "two hundred twenty-one million, eight hundred thirty-eight thousand, eight hundred eighty-four".