522218 has 8 divisors (see below), whose sum is σ = 804612. Its totient is φ = 254016.

The previous prime is 522211. The next prime is 522227. The reversal of 522218 is 812225.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 170569 = 593^2 + 413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 5⁸ + 2⁹ + 2¹⁶ + 2¹⁶ + 1 + 8 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 522218.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 522218.

It is not an unprimeable number, because it can be changed into a prime (522211) 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, 3455 + ... + 3602.

2⁵²²²¹⁸ is an apocalyptic number.

522218 is a deficient number, since it is larger than the sum of its proper divisors (282394).

522218 is a wasteful number, since it uses less digits than its factorization.

522218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096.

The product of its digits is 320, while the sum is 20.

The square root of 522218 is about 722.6465249346. The cubic root of 522218 is about 80.5286859432.

The spelling of 522218 in words is "five hundred twenty-two thousand, two hundred eighteen".