522212213 has 4 divisors (see below), whose sum is σ = 522538380. Its totient is φ = 521886048.

The previous prime is 522212183. The next prime is 522212221. The reversal of 522212213 is 312212225.

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 243422404 + 278789809 = 15602^2 + 16697^2 .

It is a cyclic number.

It is not a de Polignac number, because 522212213 - 2⁶ = 522212149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522212513) 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, 160670 + ... + 163887.

It is an arithmetic number, because the mean of its divisors is an integer number (130634595).

Almost surely, 2^522212213 is an apocalyptic number.

It is an amenable number.

522212213 is a deficient number, since it is larger than the sum of its proper divisors (326167).

522212213 is a wasteful number, since it uses less digits than its factorization.

522212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326166.

The product of its digits is 480, while the sum is 20.

The square root of 522212213 is about 22851.9630010203. The cubic root of 522212213 is about 805.2838848043.

Adding to 522212213 its reverse (312212225), we get a palindrome (834424438).

The spelling of 522212213 in words is "five hundred twenty-two million, two hundred twelve thousand, two hundred thirteen".