520003161 has 12 divisors (see below), whose sum is σ = 753773488. Its totient is φ = 345442104.

The previous prime is 520003111. The next prime is 520003177. The reversal of 520003161 is 161300025.

It is a de Polignac number, because none of the positive numbers 2^k-520003161 is a prime.

It is a super-3 number, since 3×520003161³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520003111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99535 + ... + 104628.

Almost surely, 2^520003161 is an apocalyptic number.

It is an amenable number.

520003161 is a deficient number, since it is larger than the sum of its proper divisors (233770327).

520003161 is a wasteful number, since it uses less digits than its factorization.

520003161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204452 (or 204449 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 520003161 is about 22803.5778113874. The cubic root of 520003161 is about 804.1467811394.

Adding to 520003161 its reverse (161300025), we get a palindrome (681303186).

The spelling of 520003161 in words is "five hundred twenty million, three thousand, one hundred sixty-one".