5138297581 has 2 divisors, whose sum is σ = 5138297582. Its totient is φ = 5138297580.

The previous prime is 5138297579. The next prime is 5138297587. The reversal of 5138297581 is 1857928315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4277814025 + 860483556 = 65405^2 + 29334^2 .

It is a cyclic number.

It is not a de Polignac number, because 5138297581 - 2¹ = 5138297579 is a prime.

It is a super-2 number, since 2×5138297581² = 52804204061820903122, which contains 22 as substring.

Together with 5138297579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5138297587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2569148790 + 2569148791.

It is an arithmetic number, because the mean of its divisors is an integer number (2569148791).

Almost surely, 2^5138297581 is an apocalyptic number.

It is an amenable number.

5138297581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5138297581 is an equidigital number, since it uses as much as digits as its factorization.

5138297581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 49.

The square root of 5138297581 is about 71681.9194846232. The cubic root of 5138297581 is about 1725.5984851564.

The spelling of 5138297581 in words is "five billion, one hundred thirty-eight million, two hundred ninety-seven thousand, five hundred eighty-one".