520388025 has 48 divisors (see below), whose sum is σ = 875818944. Its totient is φ = 272609280.

The previous prime is 520387999. The next prime is 520388027. The reversal of 520388025 is 520883025.

It is not a de Polignac number, because 520388025 - 2¹⁰ = 520387001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520388027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1694922 + ... + 1695228.

It is an arithmetic number, because the mean of its divisors is an integer number (18246228).

Almost surely, 2^520388025 is an apocalyptic number.

It is an amenable number.

520388025 is a deficient number, since it is larger than the sum of its proper divisors (355430919).

520388025 is a wasteful number, since it uses less digits than its factorization.

520388025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 520388025 is about 22812.0149263497. The cubic root of 520388025 is about 804.3451202066.

The spelling of 520388025 in words is "five hundred twenty million, three hundred eighty-eight thousand, twenty-five".