5245715581 has 2 divisors, whose sum is σ = 5245715582. Its totient is φ = 5245715580.

The previous prime is 5245715537. The next prime is 5245715597. The reversal of 5245715581 is 1855175425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4592095225 + 653620356 = 67765^2 + 25566^2 .

It is a cyclic number.

It is not a de Polignac number, because 5245715581 - 2¹⁹ = 5245191293 is a prime.

It is a super-2 number, since 2×5245715581² = 55035063913492335122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5245719581) 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, 2622857790 + 2622857791.

It is an arithmetic number, because the mean of its divisors is an integer number (2622857791).

Almost surely, 2^5245715581 is an apocalyptic number.

It is an amenable number.

5245715581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5245715581 is an equidigital number, since it uses as much as digits as its factorization.

5245715581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280000, while the sum is 43.

The square root of 5245715581 is about 72427.3123966367. The cubic root of 5245715581 is about 1737.5404079142.

The spelling of 5245715581 in words is "five billion, two hundred forty-five million, seven hundred fifteen thousand, five hundred eighty-one".