520117161 has 4 divisors (see below), whose sum is σ = 693489552. Its totient is φ = 346744772.

The previous prime is 520117151. The next prime is 520117183. The reversal of 520117161 is 161711025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520117161 - 2⁶ = 520117097 is a prime.

It is a super-2 number, since 2×520117161² = 541043722333399842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520117111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86686191 + ... + 86686196.

It is an arithmetic number, because the mean of its divisors is an integer number (173372388).

Almost surely, 2^520117161 is an apocalyptic number.

It is an amenable number.

520117161 is a deficient number, since it is larger than the sum of its proper divisors (173372391).

520117161 is a wasteful number, since it uses less digits than its factorization.

520117161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173372390.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 520117161 is about 22806.0772821632. The cubic root of 520117161 is about 804.2055410609.

Adding to 520117161 its reverse (161711025), we get a palindrome (681828186).

The spelling of 520117161 in words is "five hundred twenty million, one hundred seventeen thousand, one hundred sixty-one".