243120354320 has 40 divisors (see below), whose sum is σ = 565368962136. Its totient is φ = 97228505088.

The previous prime is 243120354227. The next prime is 243120354383. The reversal of 243120354320 is 23453021342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22190273296 + 220930081024 = 148964^2 + 470032^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 95114 + ... + 703766.

Almost surely, 2^243120354320 is an apocalyptic number.

243120354320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243120354320 is an abundant number, since it is smaller than the sum of its proper divisors (322248607816).

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

243120354320 is a wasteful number, since it uses less digits than its factorization.

243120354320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613659 (or 613653 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 243120354320 its reverse (23453021342), we get a palindrome (266573375662).

The spelling of 243120354320 in words is "two hundred forty-three billion, one hundred twenty million, three hundred fifty-four thousand, three hundred twenty".