243005306012 has 72 divisors (see below), whose sum is σ = 515200904064. Its totient is φ = 98228238624.

The previous prime is 243005305987. The next prime is 243005306023. The reversal of 243005306012 is 210603500342.

243005306012 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 23 ways as a sum of consecutive naturals, for example, 2241563 + ... + 2347469.

It is an arithmetic number, because the mean of its divisors is an integer number (7155568112).

Almost surely, 2^243005306012 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 243005306012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257600452032).

243005306012 is an abundant number, since it is smaller than the sum of its proper divisors (272195598052).

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

243005306012 is a wasteful number, since it uses less digits than its factorization.

243005306012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106183 (or 106162 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 243005306012 its reverse (210603500342), we get a palindrome (453608806354).

The spelling of 243005306012 in words is "two hundred forty-three billion, five million, three hundred six thousand, twelve".