243251205312 has 56 divisors (see below), whose sum is σ = 644208146176. Its totient is φ = 81007388928.

The previous prime is 243251205311. The next prime is 243251205319. The reversal of 243251205312 is 213502152342.

243251205312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243251205312² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243251205312.

It is not an unprimeable number, because it can be changed into a prime (243251205311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391828 + ... + 800019.

It is an arithmetic number, because the mean of its divisors is an integer number (11503716896).

Almost surely, 2^243251205312 is an apocalyptic number.

It is an amenable number.

243251205312 is an abundant number, since it is smaller than the sum of its proper divisors (400956940864).

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

243251205312 is a wasteful number, since it uses less digits than its factorization.

243251205312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192925 (or 1192915 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 243251205312 its reverse (213502152342), we get a palindrome (456753357654).

The spelling of 243251205312 in words is "two hundred forty-three billion, two hundred fifty-one million, two hundred five thousand, three hundred twelve".