243134554343 has 2 divisors, whose sum is σ = 243134554344. Its totient is φ = 243134554342.

The previous prime is 243134554307. The next prime is 243134554349. The reversal of 243134554343 is 343455431342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243134554343 is a prime.

It is a super-2 number, since 2×243134554343² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243134554343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243134554349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121567277171 + 121567277172.

It is an arithmetic number, because the mean of its divisors is an integer number (121567277172).

Almost surely, 2^243134554343 is an apocalyptic number.

243134554343 is a deficient number, since it is larger than the sum of its proper divisors (1).

243134554343 is an equidigital number, since it uses as much as digits as its factorization.

243134554343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 41.

Adding to 243134554343 its reverse (343455431342), we get a palindrome (586589985685).

The spelling of 243134554343 in words is "two hundred forty-three billion, one hundred thirty-four million, five hundred fifty-four thousand, three hundred forty-three".