213321443243 has 4 divisors (see below), whose sum is σ = 213322473240. Its totient is φ = 213320413248.

The previous prime is 213321443191. The next prime is 213321443263. The reversal of 213321443243 is 342344123312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213321443243 - 2⁸ = 213321442987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213321443263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84230 + ... + 658587.

It is an arithmetic number, because the mean of its divisors is an integer number (53330618310).

Almost surely, 2^213321443243 is an apocalyptic number.

213321443243 is a deficient number, since it is larger than the sum of its proper divisors (1029997).

213321443243 is an equidigital number, since it uses as much as digits as its factorization.

213321443243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029996.

The product of its digits is 41472, while the sum is 32.

Adding to 213321443243 its reverse (342344123312), we get a palindrome (555665566555).

The spelling of 213321443243 in words is "two hundred thirteen billion, three hundred twenty-one million, four hundred forty-three thousand, two hundred forty-three".