243013512500 has 144 divisors (see below), whose sum is σ = 613998076608. Its totient is φ = 83169600000.

The previous prime is 243013512499. The next prime is 243013512503. The reversal of 243013512500 is 5215310342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243013512500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243013512503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2285519 + ... + 2389481.

It is an arithmetic number, because the mean of its divisors is an integer number (4263875532).

Almost surely, 2^243013512500 is an apocalyptic number.

243013512500 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 243013512500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306999038304).

243013512500 is an abundant number, since it is smaller than the sum of its proper divisors (370984564108).

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

243013512500 is a wasteful number, since it uses less digits than its factorization.

243013512500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104020 (or 103998 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 243013512500 its reverse (5215310342), we get a palindrome (248228822842).

The spelling of 243013512500 in words is "two hundred forty-three billion, thirteen million, five hundred twelve thousand, five hundred".