243312030 has 192 divisors, whose sum is σ = 721768320. Its totient is φ = 56448000.

The previous prime is 243312023. The next prime is 243312049. The reversal of 243312030 is 30213342.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 243311994 and 243312012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2408980 + ... + 2409080.

It is an arithmetic number, because the mean of its divisors is an integer number (3759210).

Almost surely, 2^243312030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243312030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360884160).

243312030 is an abundant number, since it is smaller than the sum of its proper divisors (478456290).

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

243312030 is a wasteful number, since it uses less digits than its factorization.

243312030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 243312030 is about 15598.4624242263. The cubic root of 243312030 is about 624.2921308434.

Adding to 243312030 its reverse (30213342), we get a palindrome (273525372).

The spelling of 243312030 in words is "two hundred forty-three million, three hundred twelve thousand, thirty".