5243511509 has 2 divisors, whose sum is σ = 5243511510. Its totient is φ = 5243511508.

The previous prime is 5243511473. The next prime is 5243511517. The reversal of 5243511509 is 9051153425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4895800900 + 347710609 = 69970^2 + 18647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5243511509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5243511109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621755754 + 2621755755.

It is an arithmetic number, because the mean of its divisors is an integer number (2621755755).

Almost surely, 2^5243511509 is an apocalyptic number.

It is an amenable number.

5243511509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5243511509 is an equidigital number, since it uses as much as digits as its factorization.

5243511509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 5243511509 is about 72412.0950463388. The cubic root of 5243511509 is about 1737.2970219488.

The spelling of 5243511509 in words is "five billion, two hundred forty-three million, five hundred eleven thousand, five hundred nine".