243121240500 has 96 divisors (see below), whose sum is σ = 708354436608. Its totient is φ = 64797040000.

The previous prime is 243121240489. The next prime is 243121240511. The reversal of 243121240500 is 5042121342.

243121240500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243121240489) and next prime (243121240511).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2772325 + ... + 2858675.

It is an arithmetic number, because the mean of its divisors is an integer number (7378692048).

Almost surely, 2^243121240500 is an apocalyptic number.

243121240500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243121240500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354177218304).

243121240500 is an abundant number, since it is smaller than the sum of its proper divisors (465233196108).

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

243121240500 is a wasteful number, since it uses less digits than its factorization.

243121240500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88250 (or 88238 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 243121240500 its reverse (5042121342), we get a palindrome (248163361842).

The spelling of 243121240500 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty thousand, five hundred".