243213143 has 2 divisors, whose sum is σ = 243213144. Its totient is φ = 243213142.

The previous prime is 243213121. The next prime is 243213181. The reversal of 243213143 is 341312342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243213143 - 2⁶ = 243213079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243213643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121606571 + 121606572.

It is an arithmetic number, because the mean of its divisors is an integer number (121606572).

Almost surely, 2^243213143 is an apocalyptic number.

243213143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213143 is an equidigital number, since it uses as much as digits as its factorization.

243213143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 243213143 is about 15595.2923345476. The cubic root of 243213143 is about 624.2075443404.

Adding to 243213143 its reverse (341312342), we get a palindrome (584525485).

The spelling of 243213143 in words is "two hundred forty-three million, two hundred thirteen thousand, one hundred forty-three".