522643 has 4 divisors (see below), whose sum is σ = 570168. Its totient is φ = 475120.

The previous prime is 522637. The next prime is 522659. The reversal of 522643 is 346225.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522643 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.

It is not an unprimeable number, because it can be changed into a prime (522623) 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 3 ways as a sum of consecutive naturals, for example, 23746 + ... + 23767.

It is an arithmetic number, because the mean of its divisors is an integer number (142542).

2⁵²²⁶⁴³ is an apocalyptic number.

522643 is a deficient number, since it is larger than the sum of its proper divisors (47525).

522643 is a wasteful number, since it uses less digits than its factorization.

522643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47524.

The product of its digits is 1440, while the sum is 22.

The square root of 522643 is about 722.9405231414. The cubic root of 522643 is about 80.5505257440.

Adding to 522643 its reverse (346225), we get a palindrome (868868).

The spelling of 522643 in words is "five hundred twenty-two thousand, six hundred forty-three".