221820040184 has 16 divisors (see below), whose sum is σ = 415918971720. Its totient is φ = 110908314400.

The previous prime is 221820040171. The next prime is 221820040193. The reversal of 221820040184 is 481040028122.

221820040184 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221820040184.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467222 + ... + 813594.

Almost surely, 2^221820040184 is an apocalyptic number.

It is an amenable number.

221820040184 is a deficient number, since it is larger than the sum of its proper divisors (194098931536).

221820040184 is a wasteful number, since it uses less digits than its factorization.

221820040184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426430 (or 426426 counting only the distinct ones).

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

The spelling of 221820040184 in words is "two hundred twenty-one billion, eight hundred twenty million, forty thousand, one hundred eighty-four".