505550165 has 16 divisors (see below), whose sum is σ = 642945600. Its totient is φ = 380294400.

The previous prime is 505550161. The next prime is 505550167. The reversal of 505550165 is 561055505.

It is not a de Polignac number, because 505550165 - 2² = 505550161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505550161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121286 + ... + 125384.

It is an arithmetic number, because the mean of its divisors is an integer number (40184100).

Almost surely, 2^505550165 is an apocalyptic number.

It is an amenable number.

505550165 is a deficient number, since it is larger than the sum of its proper divisors (137395435).

505550165 is a wasteful number, since it uses less digits than its factorization.

505550165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 505550165 is about 22484.4427326985. The cubic root of 505550165 is about 796.6265053506.

The spelling of 505550165 in words is "five hundred five million, five hundred fifty thousand, one hundred sixty-five".