243312424 has 8 divisors (see below), whose sum is σ = 456210810. Its totient is φ = 121656208.

The previous prime is 243312389. The next prime is 243312463. The reversal of 243312424 is 424213342.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 137592900 + 105719524 = 11730^2 + 10282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 14.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 15207019 + ... + 15207034.

Almost surely, 2^243312424 is an apocalyptic number.

It is an amenable number.

243312424 is a deficient number, since it is larger than the sum of its proper divisors (212898386).

243312424 is a wasteful number, since it uses less digits than its factorization.

243312424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30414059 (or 30414055 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 243312424 is about 15598.4750536711. The cubic root of 243312424 is about 624.2924678194.

Adding to 243312424 its reverse (424213342), we get a palindrome (667525766).

The spelling of 243312424 in words is "two hundred forty-three million, three hundred twelve thousand, four hundred twenty-four".