522805 has 4 divisors (see below), whose sum is σ = 627372. Its totient is φ = 418240.

The previous prime is 522787. The next prime is 522811. The reversal of 522805 is 508225.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161604 + 361201 = 402^2 + 601^2 .

It is not a de Polignac number, because 522805 - 2⁷ = 522677 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

522805 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 52276 + ... + 52285.

It is an arithmetic number, because the mean of its divisors is an integer number (156843).

2⁵²²⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

522805 is a deficient number, since it is larger than the sum of its proper divisors (104567).

522805 is a wasteful number, since it uses less digits than its factorization.

522805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104566.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 522805 is about 723.0525568726. The cubic root of 522805 is about 80.5588474455.

The spelling of 522805 in words is "five hundred twenty-two thousand, eight hundred five".