243155205343 has 2 divisors, whose sum is σ = 243155205344. Its totient is φ = 243155205342.

The previous prime is 243155205299. The next prime is 243155205361. The reversal of 243155205343 is 343502551342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243155205343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243155305343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121577602671 + 121577602672.

It is an arithmetic number, because the mean of its divisors is an integer number (121577602672).

Almost surely, 2^243155205343 is an apocalyptic number.

243155205343 is a deficient number, since it is larger than the sum of its proper divisors (1).

243155205343 is an equidigital number, since it uses as much as digits as its factorization.

243155205343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 243155205343 its reverse (343502551342), we get a palindrome (586657756685).

The spelling of 243155205343 in words is "two hundred forty-three billion, one hundred fifty-five million, two hundred five thousand, three hundred forty-three".