520340165 has 24 divisors (see below), whose sum is σ = 666104040. Its totient is φ = 390130688.

The previous prime is 520340147. The next prime is 520340179. The reversal of 520340165 is 561043025.

It can be written as a sum of positive squares in 12 ways, for example, as 95609284 + 424730881 = 9778^2 + 20609^2 .

It is not a de Polignac number, because 520340165 - 2⁶ = 520340101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 422771 + ... + 423999.

It is an arithmetic number, because the mean of its divisors is an integer number (27754335).

Almost surely, 2^520340165 is an apocalyptic number.

It is an amenable number.

520340165 is a deficient number, since it is larger than the sum of its proper divisors (145763875).

520340165 is a wasteful number, since it uses less digits than its factorization.

520340165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1544 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 520340165 is about 22810.9658936223. The cubic root of 520340165 is about 804.3204609551.

The spelling of 520340165 in words is "five hundred twenty million, three hundred forty thousand, one hundred sixty-five".