243001120520 has 32 divisors (see below), whose sum is σ = 578914435800. Its totient is φ = 91482774528.

The previous prime is 243001120519. The next prime is 243001120543. The reversal of 243001120520 is 25021100342.

243001120520 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 4 ways, for example, as 203886565444 + 39114555076 = 451538^2 + 197774^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 243001120492 and 243001120501.

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, 178676615 + ... + 178677974.

Almost surely, 2^243001120520 is an apocalyptic number.

243001120520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243001120520 is an abundant number, since it is smaller than the sum of its proper divisors (335913315280).

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

243001120520 is a wasteful number, since it uses less digits than its factorization.

243001120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357354617 (or 357354613 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 243001120520 its reverse (25021100342), we get a palindrome (268022220862).

The spelling of 243001120520 in words is "two hundred forty-three billion, one million, one hundred twenty thousand, five hundred twenty".