243030 has 16 divisors (see below), whose sum is σ = 583344. Its totient is φ = 64800.

The previous prime is 243011. The next prime is 243031. The reversal of 243030 is 30342.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242997 and 243015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243031) by changing a digit.

243030 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 4021 + ... + 4080.

It is an arithmetic number, because the mean of its divisors is an integer number (36459).

2²⁴³⁰³⁰ is an apocalyptic number.

243030 is an abundant number, since it is smaller than the sum of its proper divisors (340314).

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

243030 is a wasteful number, since it uses less digits than its factorization.

243030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 243030 is about 492.9807298465. The cubic root of 243030 is about 62.4050825906.

Adding to 243030 its reverse (30342), we get a palindrome (273372).

It can be divided in two parts, 2430 and 30, that multiplied together give a square (72900 = 270²).

The spelling of 243030 in words is "two hundred forty-three thousand, thirty".