243424013 has 8 divisors (see below), whose sum is σ = 283876800. Its totient is φ = 208648860.

The previous prime is 243424009. The next prime is 243424061. The reversal of 243424013 is 310424342.

It is not a de Polignac number, because 243424013 - 2² = 243424009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243424013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243424063) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 354503 + ... + 355188.

It is an arithmetic number, because the mean of its divisors is an integer number (35484600).

Almost surely, 2^243424013 is an apocalyptic number.

It is an amenable number.

243424013 is a deficient number, since it is larger than the sum of its proper divisors (40452787).

243424013 is an frugal number, since it uses more digits than its factorization.

243424013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709712 (or 709698 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243424013 is about 15602.0515638169. The cubic root of 243424013 is about 624.3878918067.

Adding to 243424013 its reverse (310424342), we get a palindrome (553848355).

The spelling of 243424013 in words is "two hundred forty-three million, four hundred twenty-four thousand, thirteen".