5128503581 has 2 divisors, whose sum is σ = 5128503582. Its totient is φ = 5128503580.

The previous prime is 5128503571. The next prime is 5128503641. The reversal of 5128503581 is 1853058215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4723125625 + 405377956 = 68725^2 + 20134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5128503581 is a prime.

It is a super-2 number, since 2×5128503581² = 52603097960659647122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5128503571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564251790 + 2564251791.

It is an arithmetic number, because the mean of its divisors is an integer number (2564251791).

Almost surely, 2^5128503581 is an apocalyptic number.

It is an amenable number.

5128503581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5128503581 is an equidigital number, since it uses as much as digits as its factorization.

5128503581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 5128503581 is about 71613.5712068599. The cubic root of 5128503581 is about 1724.5014122716.

The spelling of 5128503581 in words is "five billion, one hundred twenty-eight million, five hundred three thousand, five hundred eighty-one".