243115221306 has 16 divisors (see below), whose sum is σ = 486250890048. Its totient is φ = 81034999200.

The previous prime is 243115221257. The next prime is 243115221329. The reversal of 243115221306 is 603122511342.

243115221306 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695190 + ... + 984641.

It is an arithmetic number, because the mean of its divisors is an integer number (30390680628).

Almost surely, 2^243115221306 is an apocalyptic number.

243115221306 is an abundant number, since it is smaller than the sum of its proper divisors (243135668742).

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

243115221306 is a wasteful number, since it uses less digits than its factorization.

243115221306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703957.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 243115221306 its reverse (603122511342), we get a palindrome (846237732648).

The spelling of 243115221306 in words is "two hundred forty-three billion, one hundred fifteen million, two hundred twenty-one thousand, three hundred six".