528020825 has 6 divisors (see below), whose sum is σ = 654745854. Its totient is φ = 422416640.

The previous prime is 528020813. The next prime is 528020921.

It is a happy number.

528020825 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 1364224 + 526656601 = 1168^2 + 22949^2 .

It is not a de Polignac number, because 528020825 - 2⁴ = 528020809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 528020791 and 528020800.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10560392 + ... + 10560441.

It is an arithmetic number, because the mean of its divisors is an integer number (109124309).

Almost surely, 2^528020825 is an apocalyptic number.

It is an amenable number.

528020825 is a deficient number, since it is larger than the sum of its proper divisors (126725029).

528020825 is a wasteful number, since it uses less digits than its factorization.

528020825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120843 (or 21120838 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 528020825 is about 22978.7037275822. The cubic root of 528020825 is about 808.2586300988.

The spelling of 528020825 in words is "five hundred twenty-eight million, twenty thousand, eight hundred twenty-five".