522220211 has 4 divisors (see below), whose sum is σ = 522630432. Its totient is φ = 521809992.

The previous prime is 522220163. The next prime is 522220213. The reversal of 522220211 is 112022225.

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-522220211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 522220211.

It is not an unprimeable number, because it can be changed into a prime (522220213) 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, 203195 + ... + 205748.

It is an arithmetic number, because the mean of its divisors is an integer number (130657608).

Almost surely, 2^522220211 is an apocalyptic number.

522220211 is a deficient number, since it is larger than the sum of its proper divisors (410221).

522220211 is a wasteful number, since it uses less digits than its factorization.

522220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410220.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 522220211 is about 22852.1379962576. The cubic root of 522220211 is about 805.2879959220.

Adding to 522220211 its reverse (112022225), we get a palindrome (634242436).

The spelling of 522220211 in words is "five hundred twenty-two million, two hundred twenty thousand, two hundred eleven".