520620165 has 48 divisors (see below), whose sum is σ = 973994112. Its totient is φ = 255733632.

The previous prime is 520620161. The next prime is 520620181. The reversal of 520620165 is 561026025.

520620165 is a `hidden beast` number, since 5 + 20 + 620 + 16 + 5 = 666.

It is not a de Polignac number, because 520620165 - 2² = 520620161 is a prime.

It is a super-3 number, since 3×520620165³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520620161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 398904 + ... + 400206.

It is an arithmetic number, because the mean of its divisors is an integer number (20291544).

Almost surely, 2^520620165 is an apocalyptic number.

It is an amenable number.

520620165 is a deficient number, since it is larger than the sum of its proper divisors (453373947).

520620165 is a wasteful number, since it uses less digits than its factorization.

520620165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 520620165 is about 22817.1024672284. The cubic root of 520620165 is about 804.4647059192.

The spelling of 520620165 in words is "five hundred twenty million, six hundred twenty thousand, one hundred sixty-five".