221493882 has 8 divisors (see below), whose sum is σ = 442987776. Its totient is φ = 73831292.

The previous prime is 221493869. The next prime is 221493907. The reversal of 221493882 is 288394122.

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

221493882 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 221493882.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18457818 + ... + 18457829.

It is an arithmetic number, because the mean of its divisors is an integer number (55373472).

Almost surely, 2^221493882 is an apocalyptic number.

221493882 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.

221493882 is a wasteful number, since it uses less digits than its factorization.

221493882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36915652.

The product of its digits is 55296, while the sum is 39.

The square root of 221493882 is about 14882.6705264882. The cubic root of 221493882 is about 605.0443989910.

The spelling of 221493882 in words is "two hundred twenty-one million, four hundred ninety-three thousand, eight hundred eighty-two".