243216200 has 48 divisors (see below), whose sum is σ = 568440180. Its totient is φ = 96776960.

The previous prime is 243216179. The next prime is 243216203. The reversal of 243216200 is 2612342.

It can be written as a sum of positive squares in 6 ways, for example, as 81468676 + 161747524 = 9026^2 + 12718^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (243216203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 36314 + ... + 42486.

Almost surely, 2^243216200 is an apocalyptic number.

243216200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243216200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284220090).

243216200 is an abundant number, since it is smaller than the sum of its proper divisors (325223980).

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

243216200 is a wasteful number, since it uses less digits than its factorization.

243216200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386 (or 6377 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243216200 is about 15595.3903445858. The cubic root of 243216200 is about 624.2101595972.

Adding to 243216200 its reverse (2612342), we get a palindrome (245828542).

The spelling of 243216200 in words is "two hundred forty-three million, two hundred sixteen thousand, two hundred".