516557117 has 2 divisors, whose sum is σ = 516557118. Its totient is φ = 516557116.

The previous prime is 516557099. The next prime is 516557131. The reversal of 516557117 is 711755615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508457401 + 8099716 = 22549^2 + 2846^2 .

It is a cyclic number.

It is not a de Polignac number, because 516557117 - 2¹⁰ = 516556093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516557137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258278558 + 258278559.

It is an arithmetic number, because the mean of its divisors is an integer number (258278559).

Almost surely, 2^516557117 is an apocalyptic number.

It is an amenable number.

516557117 is a deficient number, since it is larger than the sum of its proper divisors (1).

516557117 is an equidigital number, since it uses as much as digits as its factorization.

516557117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36750, while the sum is 38.

The square root of 516557117 is about 22727.8929291741. The cubic root of 516557117 is about 802.3664911842.

The spelling of 516557117 in words is "five hundred sixteen million, five hundred fifty-seven thousand, one hundred seventeen".