221287384563 has 16 divisors (see below), whose sum is σ = 343562086656. Its totient is φ = 124064085600.

The previous prime is 221287384529. The next prime is 221287384567. The reversal of 221287384563 is 365483782122.

221287384563 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 221287384563 - 2¹⁰ = 221287383539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221287384567) 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, 99409213 + ... + 99411438.

It is an arithmetic number, because the mean of its divisors is an integer number (21472630416).

Almost surely, 2^221287384563 is an apocalyptic number.

221287384563 is a deficient number, since it is larger than the sum of its proper divisors (122274702093).

221287384563 is a wasteful number, since it uses less digits than its factorization.

221287384563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198820714.

The product of its digits is 3870720, while the sum is 51.

The spelling of 221287384563 in words is "two hundred twenty-one billion, two hundred eighty-seven million, three hundred eighty-four thousand, five hundred sixty-three".