243423230443221 has 8 divisors (see below), whose sum is σ = 324565160721184. Its totient is φ = 162281726897040.

The previous prime is 243423230443213. The next prime is 243423230443231. The reversal of 243423230443221 is 122344032324342.

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

It is not a de Polignac number, because 243423230443221 - 2³ = 243423230443213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243423230443221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243423230443231) 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, 105349546 + ... + 107635371.

It is an arithmetic number, because the mean of its divisors is an integer number (40570645090148).

Almost surely, 2^{243423230443221} is an apocalyptic number.

It is an amenable number.

243423230443221 is a deficient number, since it is larger than the sum of its proper divisors (81141930277963).

243423230443221 is a wasteful number, since it uses less digits than its factorization.

243423230443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213365891.

The product of its (nonzero) digits is 663552, while the sum is 39.

Adding to 243423230443221 its reverse (122344032324342), we get a palindrome (365767262767563).

The spelling of 243423230443221 in words is "two hundred forty-three trillion, four hundred twenty-three billion, two hundred thirty million, four hundred forty-three thousand, two hundred twenty-one".