5135262581 has 2 divisors, whose sum is σ = 5135262582. Its totient is φ = 5135262580.

The previous prime is 5135262533. The next prime is 5135262589. The reversal of 5135262581 is 1852625315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5133722500 + 1540081 = 71650^2 + 1241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5135262581 is a prime.

It is a super-2 number, since 2×5135262581² = 52741843551637563122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5135262589) 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, 2567631290 + 2567631291.

It is an arithmetic number, because the mean of its divisors is an integer number (2567631291).

Almost surely, 2^5135262581 is an apocalyptic number.

It is an amenable number.

5135262581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5135262581 is an equidigital number, since it uses as much as digits as its factorization.

5135262581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 38.

The square root of 5135262581 is about 71660.7464446192. The cubic root of 5135262581 is about 1725.2586694363.

Adding to 5135262581 its reverse (1852625315), we get a palindrome (6987887896).

The spelling of 5135262581 in words is "five billion, one hundred thirty-five million, two hundred sixty-two thousand, five hundred eighty-one".