520513325 has 6 divisors (see below), whose sum is σ = 645436554. Its totient is φ = 416410640.

The previous prime is 520513291. The next prime is 520513333. The reversal of 520513325 is 523315025.

It can be written as a sum of positive squares in 3 ways, for example, as 4405801 + 516107524 = 2099^2 + 22718^2 .

It is not a de Polignac number, because 520513325 - 2⁶ = 520513261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520513294 and 520513303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10410242 + ... + 10410291.

It is an arithmetic number, because the mean of its divisors is an integer number (107572759).

Almost surely, 2^520513325 is an apocalyptic number.

It is an amenable number.

520513325 is a deficient number, since it is larger than the sum of its proper divisors (124923229).

520513325 is a wasteful number, since it uses less digits than its factorization.

520513325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20820543 (or 20820538 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 520513325 is about 22814.7611208182. The cubic root of 520513325 is about 804.4096722657.

The spelling of 520513325 in words is "five hundred twenty million, five hundred thirteen thousand, three hundred twenty-five".