520163365 has 8 divisors (see below), whose sum is σ = 660913560. Its totient is φ = 391652352.

The previous prime is 520163327. The next prime is 520163383. The reversal of 520163365 is 563361025.

It can be written as a sum of positive squares in 4 ways, for example, as 192155044 + 328008321 = 13862^2 + 18111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520163365 - 2¹³ = 520155173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3059700 + ... + 3059869.

It is an arithmetic number, because the mean of its divisors is an integer number (82614195).

Almost surely, 2^520163365 is an apocalyptic number.

It is an amenable number.

520163365 is a deficient number, since it is larger than the sum of its proper divisors (140750195).

520163365 is a wasteful number, since it uses less digits than its factorization.

520163365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119591.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 520163365 is about 22807.0902352755. The cubic root of 520163365 is about 804.2293539088.

The spelling of 520163365 in words is "five hundred twenty million, one hundred sixty-three thousand, three hundred sixty-five".