516555497 has 2 divisors, whose sum is σ = 516555498. Its totient is φ = 516555496.

The previous prime is 516555491. The next prime is 516555499. The reversal of 516555497 is 794555615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388050601 + 128504896 = 19699^2 + 11336^2 .

It is a cyclic number.

It is not a de Polignac number, because 516555497 - 2¹⁰ = 516554473 is a prime.

Together with 516555499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (516555491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258277748 + 258277749.

It is an arithmetic number, because the mean of its divisors is an integer number (258277749).

Almost surely, 2^516555497 is an apocalyptic number.

It is an amenable number.

516555497 is a deficient number, since it is larger than the sum of its proper divisors (1).

516555497 is an equidigital number, since it uses as much as digits as its factorization.

516555497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945000, while the sum is 47.

The square root of 516555497 is about 22727.8572901187. The cubic root of 516555497 is about 802.3656524031.

The spelling of 516555497 in words is "five hundred sixteen million, five hundred fifty-five thousand, four hundred ninety-seven".