243530 has 32 divisors (see below), whose sum is σ = 518400. Its totient is φ = 82320.

The previous prime is 243527. The next prime is 243533. The reversal of 243530 is 35342.

It is an interprime number because it is at equal distance from previous prime (243527) and next prime (243533).

It is a junction number, because it is equal to n+sod(n) for n = 243499 and 243508.

It is not an unprimeable number, because it can be changed into a prime (243533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3395 + ... + 3465.

It is an arithmetic number, because the mean of its divisors is an integer number (16200).

2²⁴³⁵³⁰ is an apocalyptic number.

243530 is an abundant number, since it is smaller than the sum of its proper divisors (274870).

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

243530 is an equidigital number, since it uses as much as digits as its factorization.

243530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 243530 is about 493.4875884964. The cubic root of 243530 is about 62.4478498312.

Adding to 243530 its reverse (35342), we get a palindrome (278872).

The spelling of 243530 in words is "two hundred forty-three thousand, five hundred thirty".