243343354221 has 60 divisors (see below), whose sum is σ = 420593773600. Its totient is φ = 139718565360.

The previous prime is 243343354213. The next prime is 243343354273. The reversal of 243343354221 is 122453343342.

243343354221 is a `hidden beast` number, since 2 + 43 + 3 + 43 + 354 + 221 = 666.

243343354221 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 243343354221 - 2³ = 243343354213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243343354421) 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 59 ways as a sum of consecutive naturals, for example, 467161 + ... + 839598.

Almost surely, 2^243343354221 is an apocalyptic number.

It is an amenable number.

243343354221 is a deficient number, since it is larger than the sum of its proper divisors (177250419379).

243343354221 is a wasteful number, since it uses less digits than its factorization.

243343354221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306812 (or 1306792 counting only the distinct ones).

The product of its digits is 207360, while the sum is 36.

Adding to 243343354221 its reverse (122453343342), we get a palindrome (365796697563).

The spelling of 243343354221 in words is "two hundred forty-three billion, three hundred forty-three million, three hundred fifty-four thousand, two hundred twenty-one".