243111216 has 20 divisors (see below), whose sum is σ = 628037432. Its totient is φ = 81037056.

The previous prime is 243111179. The next prime is 243111217. The reversal of 243111216 is 612111342.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 243111192 and 243111201.

It is not an unprimeable number, because it can be changed into a prime (243111217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532361 + ... + 2532456.

Almost surely, 2^243111216 is an apocalyptic number.

It is an amenable number.

243111216 is an abundant number, since it is smaller than the sum of its proper divisors (384926216).

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

243111216 is a wasteful number, since it uses less digits than its factorization.

243111216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064828 (or 5064822 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 243111216 is about 15592.0241149121. The cubic root of 243111216 is about 624.1203334664.

Adding to 243111216 its reverse (612111342), we get a palindrome (855222558).

The spelling of 243111216 in words is "two hundred forty-three million, one hundred eleven thousand, two hundred sixteen".