243103123530 has 160 divisors (see below), whose sum is σ = 678894883920. Its totient is φ = 62366008320.

The previous prime is 243103123517. The next prime is 243103123537. The reversal of 243103123530 is 35321301342.

243103123530 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 0 + 3 + 123 + 530 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 66519115569 + 176584007961 = 257913^2 + 420219^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 243103123494 and 243103123503.

It is not an unprimeable number, because it can be changed into a prime (243103123537) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2621760 + ... + 2712900.

Almost surely, 2^243103123530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243103123530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339447441960).

243103123530 is an abundant number, since it is smaller than the sum of its proper divisors (435791760390).

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

243103123530 is a wasteful number, since it uses less digits than its factorization.

243103123530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91286 (or 91277 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 243103123530 its reverse (35321301342), we get a palindrome (278424424872).

The spelling of 243103123530 in words is "two hundred forty-three billion, one hundred three million, one hundred twenty-three thousand, five hundred thirty".