243120353550 has 48 divisors (see below), whose sum is σ = 622388116992. Its totient is φ = 62740735200.

The previous prime is 243120353521. The next prime is 243120353551. The reversal of 243120353550 is 55353021342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120353551) 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 23 ways as a sum of consecutive naturals, for example, 26137324 + ... + 26146623.

It is an arithmetic number, because the mean of its divisors is an integer number (12966419104).

Almost surely, 2^243120353550 is an apocalyptic number.

243120353550 is an abundant number, since it is smaller than the sum of its proper divisors (379267763442).

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

243120353550 is a wasteful number, since it uses less digits than its factorization.

243120353550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52283993 (or 52283988 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 243120353550 its reverse (55353021342), we get a palindrome (298473374892).

The spelling of 243120353550 in words is "two hundred forty-three billion, one hundred twenty million, three hundred fifty-three thousand, five hundred fifty".