5238238581 has 6 divisors (see below), whose sum is σ = 7566344630. Its totient is φ = 3492159048.

The previous prime is 5238238561. The next prime is 5238238613. The reversal of 5238238581 is 1858328325.

5238238581 is a `hidden beast` number, since 5 + 2 + 38 + 2 + 38 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5095818225 + 142420356 = 71385^2 + 11934^2 .

It is not a de Polignac number, because 5238238581 - 2¹¹ = 5238236533 is a prime.

It is a super-2 number, since 2×5238238581² = 54878286862953787122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5238238561) 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 in 5 ways as a sum of consecutive naturals, for example, 291013246 + ... + 291013263.

Almost surely, 2^5238238581 is an apocalyptic number.

It is an amenable number.

5238238581 is a deficient number, since it is larger than the sum of its proper divisors (2328106049).

5238238581 is a wasteful number, since it uses less digits than its factorization.

5238238581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582026515 (or 582026512 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 5238238581 is about 72375.6767222248. The cubic root of 5238238581 is about 1736.7144788388.

The spelling of 5238238581 in words is "five billion, two hundred thirty-eight million, two hundred thirty-eight thousand, five hundred eighty-one".