221044423543 has 2 divisors, whose sum is σ = 221044423544. Its totient is φ = 221044423542.

The previous prime is 221044423487. The next prime is 221044423583. The reversal of 221044423543 is 345324440122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221044423543 - 2³³ = 212454488951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221044423499 and 221044423508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221044423583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110522211771 + 110522211772.

It is an arithmetic number, because the mean of its divisors is an integer number (110522211772).

Almost surely, 2^221044423543 is an apocalyptic number.

221044423543 is a deficient number, since it is larger than the sum of its proper divisors (1).

221044423543 is an equidigital number, since it uses as much as digits as its factorization.

221044423543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 221044423543 its reverse (345324440122), we get a palindrome (566368863665).

The spelling of 221044423543 in words is "two hundred twenty-one billion, forty-four million, four hundred twenty-three thousand, five hundred forty-three".