221543575855 has 16 divisors (see below), whose sum is σ = 317041242624. Its totient is φ = 145310568480.

The previous prime is 221543575801. The next prime is 221543575859. The reversal of 221543575855 is 558575345122.

221543575855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221543575855 - 2⁹ = 221543575343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221543575859) 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 15 ways as a sum of consecutive naturals, for example, 137603901 + ... + 137605510.

It is an arithmetic number, because the mean of its divisors is an integer number (19815077664).

Almost surely, 2^221543575855 is an apocalyptic number.

221543575855 is a deficient number, since it is larger than the sum of its proper divisors (95497666769).

221543575855 is a wasteful number, since it uses less digits than its factorization.

221543575855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275209446.

The product of its digits is 8400000, while the sum is 52.

The spelling of 221543575855 in words is "two hundred twenty-one billion, five hundred forty-three million, five hundred seventy-five thousand, eight hundred fifty-five".