505170161 has 4 divisors (see below), whose sum is σ = 511564800. Its totient is φ = 498775524.

The previous prime is 505170131. The next prime is 505170167. The reversal of 505170161 is 161071505.

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 505170161 - 2¹⁴ = 505153777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505170161.

It is not an unprimeable number, because it can be changed into a prime (505170167) 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, 3197201 + ... + 3197358.

It is an arithmetic number, because the mean of its divisors is an integer number (127891200).

Almost surely, 2^505170161 is an apocalyptic number.

It is an amenable number.

505170161 is a deficient number, since it is larger than the sum of its proper divisors (6394639).

505170161 is an equidigital number, since it uses as much as digits as its factorization.

505170161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6394638.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 505170161 is about 22475.9907679283. The cubic root of 505170161 is about 796.4268567569.

The spelling of 505170161 in words is "five hundred five million, one hundred seventy thousand, one hundred sixty-one".