515516040343 has 2 divisors, whose sum is σ = 515516040344. Its totient is φ = 515516040342.

The previous prime is 515516040329. The next prime is 515516040419. The reversal of 515516040343 is 343040615515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515516040343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515516040323) 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, 257758020171 + 257758020172.

It is an arithmetic number, because the mean of its divisors is an integer number (257758020172).

Almost surely, 2^515516040343 is an apocalyptic number.

515516040343 is a deficient number, since it is larger than the sum of its proper divisors (1).

515516040343 is an equidigital number, since it uses as much as digits as its factorization.

515516040343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 515516040343 its reverse (343040615515), we get a palindrome (858556655858).

The spelling of 515516040343 in words is "five hundred fifteen billion, five hundred sixteen million, forty thousand, three hundred forty-three".