243121410240 has 112 divisors (see below), whose sum is σ = 772940613120. Its totient is φ = 64745856000.

The previous prime is 243121410209. The next prime is 243121410241. The reversal of 243121410240 is 42014121342.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 243121410240.

It is not an unprimeable number, because it can be changed into a prime (243121410241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552351 + ... + 889569.

Almost surely, 2^243121410240 is an apocalyptic number.

243121410240 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 243121410240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386470306560).

243121410240 is an abundant number, since it is smaller than the sum of its proper divisors (529819202880).

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

243121410240 is a wasteful number, since it uses less digits than its factorization.

243121410240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337990 (or 337980 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 243121410240 its reverse (42014121342), we get a palindrome (285135531582).

The spelling of 243121410240 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred ten thousand, two hundred forty".