520828025 has 6 divisors (see below), whose sum is σ = 645826782. Its totient is φ = 416662400.

The previous prime is 520828001. The next prime is 520828027.

It is a happy number.

520828025 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 181494784 + 339333241 = 13472^2 + 18421^2 .

It is a de Polignac number, because none of the positive numbers 2^k-520828025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520827982 and 520828000.

It is not an unprimeable number, because it can be changed into a prime (520828027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10416536 + ... + 10416585.

It is an arithmetic number, because the mean of its divisors is an integer number (107637797).

Almost surely, 2^520828025 is an apocalyptic number.

It is an amenable number.

520828025 is a deficient number, since it is larger than the sum of its proper divisors (124998757).

520828025 is a wasteful number, since it uses less digits than its factorization.

520828025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20833131 (or 20833126 counting only the distinct ones).

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

The square root of 520828025 is about 22821.6569293292. The cubic root of 520828025 is about 804.5717537543.

It can be divided in two parts, 5208 and 28025, that added together give a palindrome (33233).

The spelling of 520828025 in words is "five hundred twenty million, eight hundred twenty-eight thousand, twenty-five".