518081513 has 2 divisors, whose sum is σ = 518081514. Its totient is φ = 518081512.

The previous prime is 518081503. The next prime is 518081521. The reversal of 518081513 is 315180815.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343101529 + 174979984 = 18523^2 + 13228^2 .

It is a cyclic number.

It is not a de Polignac number, because 518081513 - 2⁴ = 518081497 is a prime.

It is a super-2 number, since 2×518081513² = 536816908224738338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 518081513.

It is not a weakly prime, because it can be changed into another prime (518081503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259040756 + 259040757.

It is an arithmetic number, because the mean of its divisors is an integer number (259040757).

Almost surely, 2^518081513 is an apocalyptic number.

It is an amenable number.

518081513 is a deficient number, since it is larger than the sum of its proper divisors (1).

518081513 is an equidigital number, since it uses as much as digits as its factorization.

518081513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 32.

The square root of 518081513 is about 22761.4040208419. The cubic root of 518081513 is about 803.1549958324.

The spelling of 518081513 in words is "five hundred eighteen million, eighty-one thousand, five hundred thirteen".