520165869 has 16 divisors (see below), whose sum is σ = 749791680. Its totient is φ = 319645440.

The previous prime is 520165859. The next prime is 520165913. The reversal of 520165869 is 968561025.

It is not a de Polignac number, because 520165869 - 2⁴ = 520165853 is a prime.

It is a super-2 number, since 2×520165869² = 541145062545050322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520165869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520165819) 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, 121212 + ... + 125429.

It is an arithmetic number, because the mean of its divisors is an integer number (46861980).

Almost surely, 2^520165869 is an apocalyptic number.

It is an amenable number.

520165869 is a deficient number, since it is larger than the sum of its proper divisors (229625811).

520165869 is a wasteful number, since it uses less digits than its factorization.

520165869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246700.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 520165869 is about 22807.1451304191. The cubic root of 520165869 is about 804.2306443925.

The spelling of 520165869 in words is "five hundred twenty million, one hundred sixty-five thousand, eight hundred sixty-nine".