522216 has 24 divisors (see below), whose sum is σ = 1414530. Its totient is φ = 174048.

The previous prime is 522211. The next prime is 522227. The reversal of 522216 is 612225.

522216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 125316 = 630^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 5⁸ + 2⁹ + 2¹⁶ + 2¹⁶ + 1 + 6 .

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 522216.

It is not an unprimeable number, because it can be changed into a prime (522211) by changing a digit.

522216 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3555 + ... + 3698.

2⁵²²²¹⁶ is an apocalyptic number.

It is an amenable number.

522216 is an abundant number, since it is smaller than the sum of its proper divisors (892314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

522216 is a wasteful number, since it uses less digits than its factorization.

522216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7265 (or 7258 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 522216 is about 722.6451411308. The cubic root of 522216 is about 80.5285831396.

Subtracting 522216 from its reverse (612225), we obtain a palindrome (90009).

The spelling of 522216 in words is "five hundred twenty-two thousand, two hundred sixteen".