520665225 has 24 divisors (see below), whose sum is σ = 871215072. Its totient is φ = 274339200.

The previous prime is 520665203. The next prime is 520665247. The reversal of 520665225 is 522566025.

It is an interprime number because it is at equal distance from previous prime (520665203) and next prime (520665247).

It is not a de Polignac number, because 520665225 - 2⁷ = 520665097 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 35596 + ... + 48045.

It is an arithmetic number, because the mean of its divisors is an integer number (36300628).

Almost surely, 2^520665225 is an apocalyptic number.

It is an amenable number.

520665225 is a deficient number, since it is larger than the sum of its proper divisors (350549847).

520665225 is a wasteful number, since it uses less digits than its factorization.

520665225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83737 (or 83732 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 520665225 is about 22818.0898630889. The cubic root of 520665225 is about 804.4879142237.

It can be divided in two parts, 52066 and 5225, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 520665225 in words is "five hundred twenty million, six hundred sixty-five thousand, two hundred twenty-five".