518202161 has 2 divisors, whose sum is σ = 518202162. Its totient is φ = 518202160.

The previous prime is 518202151. The next prime is 518202173. The reversal of 518202161 is 161202815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481539136 + 36663025 = 21944^2 + 6055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518202161 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 518202161.

It is not a weakly prime, because it can be changed into another prime (518202151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259101080 + 259101081.

It is an arithmetic number, because the mean of its divisors is an integer number (259101081).

Almost surely, 2^518202161 is an apocalyptic number.

It is an amenable number.

518202161 is a deficient number, since it is larger than the sum of its proper divisors (1).

518202161 is an equidigital number, since it uses as much as digits as its factorization.

518202161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 518202161 is about 22764.0541424413. The cubic root of 518202161 is about 803.2173357801.

Adding to 518202161 its reverse (161202815), we get a palindrome (679404976).

The spelling of 518202161 in words is "five hundred eighteen million, two hundred two thousand, one hundred sixty-one".