516307081 has 2 divisors, whose sum is σ = 516307082. Its totient is φ = 516307080.

The previous prime is 516307069. The next prime is 516307091. The reversal of 516307081 is 180703615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515698681 + 608400 = 22709^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 516307081 - 2⁵ = 516307049 is a prime.

It is a super-2 number, since 2×516307081² = 533146003781481122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (516307091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258153540 + 258153541.

It is an arithmetic number, because the mean of its divisors is an integer number (258153541).

Almost surely, 2^516307081 is an apocalyptic number.

It is an amenable number.

516307081 is a deficient number, since it is larger than the sum of its proper divisors (1).

516307081 is an equidigital number, since it uses as much as digits as its factorization.

516307081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 516307081 is about 22722.3916214821. The cubic root of 516307081 is about 802.2370102551.

The spelling of 516307081 in words is "five hundred sixteen million, three hundred seven thousand, eighty-one".