243121234552 has 64 divisors (see below), whose sum is σ = 532252440000. Its totient is φ = 104068153728.

The previous prime is 243121234541. The next prime is 243121234589. The reversal of 243121234552 is 255432121342.

243121234552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 2221338 + ... + 2328214.

It is an arithmetic number, because the mean of its divisors is an integer number (8316444375).

Almost surely, 2^243121234552 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 243121234552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266126220000).

243121234552 is an abundant number, since it is smaller than the sum of its proper divisors (289131205448).

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

243121234552 is a wasteful number, since it uses less digits than its factorization.

243121234552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107733 (or 107715 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

Adding to 243121234552 its reverse (255432121342), we get a palindrome (498553355894).

The spelling of 243121234552 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-four thousand, five hundred fifty-two".