516716503 has 2 divisors, whose sum is σ = 516716504. Its totient is φ = 516716502.

The previous prime is 516716491. The next prime is 516716561. The reversal of 516716503 is 305617615.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516716503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516716593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258358251 + 258358252.

It is an arithmetic number, because the mean of its divisors is an integer number (258358252).

Almost surely, 2^516716503 is an apocalyptic number.

516716503 is a deficient number, since it is larger than the sum of its proper divisors (1).

516716503 is an equidigital number, since it uses as much as digits as its factorization.

516716503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 516716503 is about 22731.3990550516. The cubic root of 516716503 is about 802.4490072832.

The spelling of 516716503 in words is "five hundred sixteen million, seven hundred sixteen thousand, five hundred three".