518204249 has 2 divisors, whose sum is σ = 518204250. Its totient is φ = 518204248.

The previous prime is 518204243. The next prime is 518204273. The reversal of 518204249 is 942402815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325549849 + 192654400 = 18043^2 + 13880^2 .

It is a cyclic number.

It is not a de Polignac number, because 518204249 - 2⁸ = 518203993 is a prime.

It is not a weakly prime, because it can be changed into another prime (518204243) 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, 259102124 + 259102125.

It is an arithmetic number, because the mean of its divisors is an integer number (259102125).

Almost surely, 2^518204249 is an apocalyptic number.

It is an amenable number.

518204249 is a deficient number, since it is larger than the sum of its proper divisors (1).

518204249 is an equidigital number, since it uses as much as digits as its factorization.

518204249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 518204249 is about 22764.1000041732. The cubic root of 518204249 is about 803.2184145840.

The spelling of 518204249 in words is "five hundred eighteen million, two hundred four thousand, two hundred forty-nine".