243143203 has 2 divisors, whose sum is σ = 243143204. Its totient is φ = 243143202.

The previous prime is 243143111. The next prime is 243143227. The reversal of 243143203 is 302341342.

It is a happy number.

243143203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243143203 - 2²¹ = 241046051 is a prime.

It is equal to p_13324306 and since 243143203 and 13324306 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (243143233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121571601 + 121571602.

It is an arithmetic number, because the mean of its divisors is an integer number (121571602).

Almost surely, 2^243143203 is an apocalyptic number.

243143203 is a deficient number, since it is larger than the sum of its proper divisors (1).

243143203 is an equidigital number, since it uses as much as digits as its factorization.

243143203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243143203 is about 15593.0498299723. The cubic root of 243143203 is about 624.1477048370.

Adding to 243143203 its reverse (302341342), we get a palindrome (545484545).

The spelling of 243143203 in words is "two hundred forty-three million, one hundred forty-three thousand, two hundred three".