243120024520 has 16 divisors (see below), whose sum is σ = 547020055260. Its totient is φ = 97248009792.

The previous prime is 243120024517. The next prime is 243120024529. The reversal of 243120024520 is 25420021342.

243120024520 is digitally balanced in base 3, 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 241672526404 + 1447498116 = 491602^2 + 38046^2 .

It is not an unprimeable number, because it can be changed into a prime (243120024529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039000267 + ... + 3039000346.

Almost surely, 2^243120024520 is an apocalyptic number.

243120024520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243120024520 is an abundant number, since it is smaller than the sum of its proper divisors (303900030740).

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

243120024520 is a wasteful number, since it uses less digits than its factorization.

243120024520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078000624 (or 6078000620 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 243120024520 its reverse (25420021342), we get a palindrome (268540045862).

The spelling of 243120024520 in words is "two hundred forty-three billion, one hundred twenty million, twenty-four thousand, five hundred twenty".