518023241 has 2 divisors, whose sum is σ = 518023242. Its totient is φ = 518023240.

The previous prime is 518023223. The next prime is 518023309. The reversal of 518023241 is 142320815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353440000 + 164583241 = 18800^2 + 12829^2 .

It is a cyclic number.

It is not a de Polignac number, because 518023241 - 2¹⁴ = 518006857 is a prime.

It is a super-2 number, since 2×518023241² = 536696156432288162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 518023241.

It is not a weakly prime, because it can be changed into another prime (518023141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259011620 + 259011621.

It is an arithmetic number, because the mean of its divisors is an integer number (259011621).

Almost surely, 2^518023241 is an apocalyptic number.

It is an amenable number.

518023241 is a deficient number, since it is larger than the sum of its proper divisors (1).

518023241 is an equidigital number, since it uses as much as digits as its factorization.

518023241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 518023241 is about 22760.1239232127. The cubic root of 518023241 is about 803.1248826800.

The spelling of 518023241 in words is "five hundred eighteen million, twenty-three thousand, two hundred forty-one".