221304730960 has 40 divisors (see below), whose sum is σ = 514891330560. Its totient is φ = 88460330112.

The previous prime is 221304730939. The next prime is 221304730991. The reversal of 221304730960 is 69037403122.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 846072 + ... + 1076311.

It is an arithmetic number, because the mean of its divisors is an integer number (12872283264).

Almost surely, 2^221304730960 is an apocalyptic number.

221304730960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221304730960 is an abundant number, since it is smaller than the sum of its proper divisors (293586599600).

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

221304730960 is a wasteful number, since it uses less digits than its factorization.

221304730960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923835 (or 1923829 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 221304730960 in words is "two hundred twenty-one billion, three hundred four million, seven hundred thirty thousand, nine hundred sixty".