243434413221 has 8 divisors (see below), whose sum is σ = 324743237280. Its totient is φ = 162207598992.

The previous prime is 243434413193. The next prime is 243434413223. The reversal of 243434413221 is 122314434342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-243434413221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243434413223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20495530 + ... + 20507403.

It is an arithmetic number, because the mean of its divisors is an integer number (40592904660).

Almost surely, 2^243434413221 is an apocalyptic number.

It is an amenable number.

243434413221 is a deficient number, since it is larger than the sum of its proper divisors (81308824059).

243434413221 is a wasteful number, since it uses less digits than its factorization.

243434413221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41004915.

The product of its digits is 55296, while the sum is 33.

Adding to 243434413221 its reverse (122314434342), we get a palindrome (365748847563).

The spelling of 243434413221 in words is "two hundred forty-three billion, four hundred thirty-four million, four hundred thirteen thousand, two hundred twenty-one".