243421234432 has 72 divisors (see below), whose sum is σ = 491494614912. Its totient is φ = 120311040000.

The previous prime is 243421234421. The next prime is 243421234453. The reversal of 243421234432 is 234432124342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16721557 + ... + 16736107.

It is an arithmetic number, because the mean of its divisors is an integer number (6826314096).

Almost surely, 2^243421234432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243421234432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245747307456).

243421234432 is an abundant number, since it is smaller than the sum of its proper divisors (248073380480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243421234432 is a wasteful number, since it uses less digits than its factorization.

243421234432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15315 (or 15301 counting only the distinct ones).

The product of its digits is 110592, while the sum is 34.

Adding to 243421234432 its reverse (234432124342), we get a palindrome (477853358774).

The spelling of 243421234432 in words is "two hundred forty-three billion, four hundred twenty-one million, two hundred thirty-four thousand, four hundred thirty-two".