522223221 has 16 divisors (see below), whose sum is σ = 793969344. Its totient is φ = 302463744.

The previous prime is 522223201. The next prime is 522223231. The reversal of 522223221 is 122322225.

It is not a de Polignac number, because 522223221 - 2⁹ = 522222709 is a prime.

It is a super-2 number, since 2×522223221² = 545434185103229682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522223201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393171 + ... + 394496.

It is an arithmetic number, because the mean of its divisors is an integer number (49623084).

Almost surely, 2^522223221 is an apocalyptic number.

522223221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

522223221 is a deficient number, since it is larger than the sum of its proper divisors (271746123).

522223221 is a wasteful number, since it uses less digits than its factorization.

522223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787700.

The product of its digits is 960, while the sum is 21.

The square root of 522223221 is about 22852.2038543332. The cubic root of 522223221 is about 805.2895431059.

Adding to 522223221 its reverse (122322225), we get a palindrome (644545446).

The spelling of 522223221 in words is "five hundred twenty-two million, two hundred twenty-three thousand, two hundred twenty-one".