505106565 has 32 divisors (see below), whose sum is σ = 845752320. Its totient is φ = 256931136.

The previous prime is 505106561. The next prime is 505106579. The reversal of 505106565 is 565601505.

It is not a de Polignac number, because 505106565 - 2² = 505106561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505106561) 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 31 ways as a sum of consecutive naturals, for example, 128824 + ... + 132686.

It is an arithmetic number, because the mean of its divisors is an integer number (26429760).

Almost surely, 2^505106565 is an apocalyptic number.

It is an amenable number.

505106565 is a deficient number, since it is larger than the sum of its proper divisors (340645755).

505106565 is a wasteful number, since it uses less digits than its factorization.

505106565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 505106565 is about 22474.5759693036. The cubic root of 505106565 is about 796.3934345612.

It can be divided in two parts, 50510 and 6565, that added together give a palindrome (57075).

The spelling of 505106565 in words is "five hundred five million, one hundred six thousand, five hundred sixty-five".