520729165 has 16 divisors (see below), whose sum is σ = 703673856. Its totient is φ = 366494400.

The previous prime is 520729163. The next prime is 520729189. The reversal of 520729165 is 561927025.

It is not a de Polignac number, because 520729165 - 2¹ = 520729163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520729163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151002 + ... + 154411.

It is an arithmetic number, because the mean of its divisors is an integer number (43979616).

Almost surely, 2^520729165 is an apocalyptic number.

520729165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520729165 is a deficient number, since it is larger than the sum of its proper divisors (182944691).

520729165 is a wasteful number, since it uses less digits than its factorization.

520729165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305460.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 520729165 is about 22819.4909014202. The cubic root of 520729165 is about 804.5208444376.

The spelling of 520729165 in words is "five hundred twenty million, seven hundred twenty-nine thousand, one hundred sixty-five".