243530334 has 64 divisors (see below), whose sum is σ = 575769600. Its totient is φ = 76080384.

The previous prime is 243530323. The next prime is 243530369. The reversal of 243530334 is 433035342.

It is a happy number.

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 = 243530298 and 243530307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98299 + ... + 100745.

It is an arithmetic number, because the mean of its divisors is an integer number (8996400).

Almost surely, 2^243530334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243530334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287884800).

243530334 is an abundant number, since it is smaller than the sum of its proper divisors (332239266).

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

243530334 is a wasteful number, since it uses less digits than its factorization.

243530334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2568 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 27.

The square root of 243530334 is about 15605.4584681130. The cubic root of 243530334 is about 624.4787838014.

Adding to 243530334 its reverse (433035342), we get a palindrome (676565676).

The spelling of 243530334 in words is "two hundred forty-three million, five hundred thirty thousand, three hundred thirty-four".