221916930500 has 24 divisors (see below), whose sum is σ = 484666577304. Its totient is φ = 88766772000.

The previous prime is 221916930359. The next prime is 221916930517. The reversal of 221916930500 is 5039619122.

221916930500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16606445956 + 205310484544 = 128866^2 + 453112^2 .

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 7 ways as a sum of consecutive naturals, for example, 221916431 + ... + 221917430.

It is an arithmetic number, because the mean of its divisors is an integer number (20194440721).

Almost surely, 2^221916930500 is an apocalyptic number.

221916930500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221916930500 is an abundant number, since it is smaller than the sum of its proper divisors (262749646804).

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

221916930500 is a wasteful number, since it uses less digits than its factorization.

221916930500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443833880 (or 443833868 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 221916930500 in words is "two hundred twenty-one billion, nine hundred sixteen million, nine hundred thirty thousand, five hundred".