5238399581 has 2 divisors, whose sum is σ = 5238399582. Its totient is φ = 5238399580.

The previous prime is 5238399559. The next prime is 5238399599. The reversal of 5238399581 is 1859938325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5005562500 + 232837081 = 70750^2 + 15259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5238399581 is a prime.

It is a super-2 number, since 2×5238399581² = 54881660340441951122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5238399511) 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, 2619199790 + 2619199791.

It is an arithmetic number, because the mean of its divisors is an integer number (2619199791).

Almost surely, 2^5238399581 is an apocalyptic number.

It is an amenable number.

5238399581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5238399581 is an equidigital number, since it uses as much as digits as its factorization.

5238399581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 53.

The square root of 5238399581 is about 72376.7889658004. The cubic root of 5238399581 is about 1736.7322715988.

The spelling of 5238399581 in words is "five billion, two hundred thirty-eight million, three hundred ninety-nine thousand, five hundred eighty-one".