5259318521 has 2 divisors, whose sum is σ = 5259318522. Its totient is φ = 5259318520.

The previous prime is 5259318499. The next prime is 5259318527. The reversal of 5259318521 is 1258139525.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5214428521 + 44890000 = 72211^2 + 6700^2 .

It is a cyclic number.

It is not a de Polignac number, because 5259318521 - 2⁶ = 5259318457 is a prime.

It is not a weakly prime, because it can be changed into another prime (5259318527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629659260 + 2629659261.

It is an arithmetic number, because the mean of its divisors is an integer number (2629659261).

Almost surely, 2^5259318521 is an apocalyptic number.

It is an amenable number.

5259318521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5259318521 is an equidigital number, since it uses as much as digits as its factorization.

5259318521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 41.

The square root of 5259318521 is about 72521.1591261475. The cubic root of 5259318521 is about 1739.0410139259.

The spelling of 5259318521 in words is "five billion, two hundred fifty-nine million, three hundred eighteen thousand, five hundred twenty-one".