518718041 has 4 divisors (see below), whose sum is σ = 536604900. Its totient is φ = 500831184.

The previous prime is 518718007. The next prime is 518718043. The reversal of 518718041 is 140817815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207936400 + 310781641 = 14420^2 + 17629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518718041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518717992 and 518718010.

It is not an unprimeable number, because it can be changed into a prime (518718043) 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, 8943386 + ... + 8943443.

It is an arithmetic number, because the mean of its divisors is an integer number (134151225).

Almost surely, 2^518718041 is an apocalyptic number.

It is an amenable number.

518718041 is a deficient number, since it is larger than the sum of its proper divisors (17886859).

518718041 is a wasteful number, since it uses less digits than its factorization.

518718041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17886858.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 518718041 is about 22775.3823458576. The cubic root of 518718041 is about 803.4837867034.

The spelling of 518718041 in words is "five hundred eighteen million, seven hundred eighteen thousand, forty-one".