5218836509 has 2 divisors, whose sum is σ = 5218836510. Its totient is φ = 5218836508.

The previous prime is 5218836479. The next prime is 5218836523. The reversal of 5218836509 is 9056388125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4966725625 + 252110884 = 70475^2 + 15878^2 .

It is a cyclic number.

It is not a de Polignac number, because 5218836509 - 2⁸ = 5218836253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5218836559) 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, 2609418254 + 2609418255.

It is an arithmetic number, because the mean of its divisors is an integer number (2609418255).

Almost surely, 2^5218836509 is an apocalyptic number.

It is an amenable number.

5218836509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5218836509 is an equidigital number, since it uses as much as digits as its factorization.

5218836509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 5218836509 is about 72241.5151349970. The cubic root of 5218836509 is about 1734.5676027446.

The spelling of 5218836509 in words is "five billion, two hundred eighteen million, eight hundred thirty-six thousand, five hundred nine".