243513143 has 2 divisors, whose sum is σ = 243513144. Its totient is φ = 243513142.

The previous prime is 243513133. The next prime is 243513187. The reversal of 243513143 is 341315342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243513143 - 2¹⁸ = 243250999 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243513133) 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 as a sum of consecutive naturals, namely, 121756571 + 121756572.

It is an arithmetic number, because the mean of its divisors is an integer number (121756572).

Almost surely, 2^243513143 is an apocalyptic number.

243513143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243513143 is an equidigital number, since it uses as much as digits as its factorization.

243513143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 243513143 is about 15604.9076575288. The cubic root of 243513143 is about 624.4640893042.

Adding to 243513143 its reverse (341315342), we get a palindrome (584828485).

The spelling of 243513143 in words is "two hundred forty-three million, five hundred thirteen thousand, one hundred forty-three".