243352213221 has 16 divisors (see below), whose sum is σ = 349587270144. Its totient is φ = 149687300544.

The previous prime is 243352213171. The next prime is 243352213267. The reversal of 243352213221 is 122312253342.

243352213221 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 243352213221 - 2¹⁸ = 243351951077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243352217221) 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, 1327566 + ... + 1499711.

It is an arithmetic number, because the mean of its divisors is an integer number (21849204384).

Almost surely, 2^243352213221 is an apocalyptic number.

It is an amenable number.

243352213221 is a deficient number, since it is larger than the sum of its proper divisors (106235056923).

243352213221 is a wasteful number, since it uses less digits than its factorization.

243352213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829500.

The product of its digits is 17280, while the sum is 30.

Adding to 243352213221 its reverse (122312253342), we get a palindrome (365664466563).

The spelling of 243352213221 in words is "two hundred forty-three billion, three hundred fifty-two million, two hundred thirteen thousand, two hundred twenty-one".