243424216 has 64 divisors (see below), whose sum is σ = 540348480. Its totient is φ = 100638720.

The previous prime is 243424189. The next prime is 243424273. The reversal of 243424216 is 612424342.

243424216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222166 + ... + 223258.

It is an arithmetic number, because the mean of its divisors is an integer number (8442945).

Almost surely, 2^243424216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243424216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270174240).

243424216 is an abundant number, since it is smaller than the sum of its proper divisors (296924264).

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

243424216 is a wasteful number, since it uses less digits than its factorization.

243424216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 1240 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 243424216 is about 15602.0580693702. The cubic root of 243424216 is about 624.3880653732.

Adding to 243424216 its reverse (612424342), we get a palindrome (855848558).

The spelling of 243424216 in words is "two hundred forty-three million, four hundred twenty-four thousand, two hundred sixteen".