516317957 has 4 divisors (see below), whose sum is σ = 517272876. Its totient is φ = 515363040.

The previous prime is 516317947. The next prime is 516317993. The reversal of 516317957 is 759713615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 759713615 = 5 ⋅151942723.

It can be written as a sum of positive squares in 2 ways, for example, as 275261281 + 241056676 = 16591^2 + 15526^2 .

It is a cyclic number.

It is not a de Polignac number, because 516317957 - 2²⁶ = 449209093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516317947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476648 + ... + 477729.

It is an arithmetic number, because the mean of its divisors is an integer number (129318219).

Almost surely, 2^516317957 is an apocalyptic number.

It is an amenable number.

516317957 is a deficient number, since it is larger than the sum of its proper divisors (954919).

516317957 is an equidigital number, since it uses as much as digits as its factorization.

516317957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954918.

The product of its digits is 198450, while the sum is 44.

The square root of 516317957 is about 22722.6309436209. The cubic root of 516317957 is about 802.2426432519.

The spelling of 516317957 in words is "five hundred sixteen million, three hundred seventeen thousand, nine hundred fifty-seven".