243245505220 has 12 divisors (see below), whose sum is σ = 510815561004. Its totient is φ = 97298202080.

The previous prime is 243245505197. The next prime is 243245505221. The reversal of 243245505220 is 22505542342.

243245505220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163578184704 + 79667320516 = 404448^2 + 282254^2 .

It is not an unprimeable number, because it can be changed into a prime (243245505221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6081137611 + ... + 6081137650.

It is an arithmetic number, because the mean of its divisors is an integer number (42567963417).

Almost surely, 2^243245505220 is an apocalyptic number.

243245505220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243245505220 is an abundant number, since it is smaller than the sum of its proper divisors (267570055784).

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

243245505220 is a wasteful number, since it uses less digits than its factorization.

243245505220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12162275270 (or 12162275268 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

The spelling of 243245505220 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred five thousand, two hundred twenty".