243216003 has 12 divisors (see below), whose sum is σ = 326098520. Its totient is φ = 161243712.

The previous prime is 243215989. The next prime is 243216013. The reversal of 243216003 is 300612342.

It is a happy number.

It is not a de Polignac number, because 243216003 - 2²⁰ = 242167427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243216013) 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, 115383 + ... + 117471.

Almost surely, 2^243216003 is an apocalyptic number.

243216003 is a deficient number, since it is larger than the sum of its proper divisors (82882517).

243216003 is an equidigital number, since it uses as much as digits as its factorization.

243216003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 243216003 is about 15595.3840286156. The cubic root of 243216003 is about 624.2099910648.

Adding to 243216003 its reverse (300612342), we get a palindrome (543828345).

The spelling of 243216003 in words is "two hundred forty-three million, two hundred sixteen thousand, three".