515616313 has 2 divisors, whose sum is σ = 515616314. Its totient is φ = 515616312.

The previous prime is 515616289. The next prime is 515616337. The reversal of 515616313 is 313616515.

It is a balanced prime because it is at equal distance from previous prime (515616289) and next prime (515616337).

It can be written as a sum of positive squares in only one way, i.e., 515607849 + 8464 = 22707^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515616313 is a prime.

It is not a weakly prime, because it can be changed into another prime (515616113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257808156 + 257808157.

It is an arithmetic number, because the mean of its divisors is an integer number (257808157).

Almost surely, 2^515616313 is an apocalyptic number.

It is an amenable number.

515616313 is a deficient number, since it is larger than the sum of its proper divisors (1).

515616313 is an equidigital number, since it uses as much as digits as its factorization.

515616313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 515616313 is about 22707.1863734810. The cubic root of 515616313 is about 801.8790792251.

The spelling of 515616313 in words is "five hundred fifteen million, six hundred sixteen thousand, three hundred thirteen".