221768855923 has 8 divisors (see below), whose sum is σ = 238121324640. Its totient is φ = 205783858560.

The previous prime is 221768855863. The next prime is 221768855927. The reversal of 221768855923 is 329558867122.

221768855923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221768855923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221768855927) by changing a digit.

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, 91866588 + ... + 91869001.

It is an arithmetic number, because the mean of its divisors is an integer number (29765165580).

Almost surely, 2^221768855923 is an apocalyptic number.

221768855923 is a deficient number, since it is larger than the sum of its proper divisors (16352468717).

221768855923 is a wasteful number, since it uses less digits than its factorization.

221768855923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183735677.

The product of its digits is 14515200, while the sum is 58.

The spelling of 221768855923 in words is "two hundred twenty-one billion, seven hundred sixty-eight million, eight hundred fifty-five thousand, nine hundred twenty-three".