5128708225 has 9 divisors (see below), whose sum is σ = 6360042243. Its totient is φ = 4102680120.

The previous prime is 5128708213. The next prime is 5128708229. The reversal of 5128708225 is 5228078215.

The square root of 5128708225 is 71615.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1846334961 + 3282373264 = 42969^2 + 57292^2 .

It is not a de Polignac number, because 5128708225 - 2¹⁵ = 5128675457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5128708229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 350914 + ... + 365236.

Almost surely, 2^5128708225 is an apocalyptic number.

5128708225 is the 71615-th square number.

5128708225 is the 35808-th centered octagonal number.

It is an amenable number.

5128708225 is a deficient number, since it is larger than the sum of its proper divisors (1231334018).

5128708225 is an frugal number, since it uses more digits than its factorization.

5128708225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28656 (or 14328 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The cubic root of 5128708225 is about 1724.5243497079.

The spelling of 5128708225 in words is "five billion, one hundred twenty-eight million, seven hundred eight thousand, two hundred twenty-five".