522521222 has 16 divisors (see below), whose sum is σ = 819888480. Its totient is φ = 249281472.

The previous prime is 522521221. The next prime is 522521239. The reversal of 522521222 is 222125225.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522521221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4928 + ... + 32700.

It is an arithmetic number, because the mean of its divisors is an integer number (51243030).

Almost surely, 2^522521222 is an apocalyptic number.

522521222 is a deficient number, since it is larger than the sum of its proper divisors (297367258).

522521222 is a wasteful number, since it uses less digits than its factorization.

522521222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28207.

The product of its digits is 1600, while the sum is 23.

The square root of 522521222 is about 22858.7231051955. The cubic root of 522521222 is about 805.4426905514.

Adding to 522521222 its reverse (222125225), we get a palindrome (744646447).

The spelling of 522521222 in words is "five hundred twenty-two million, five hundred twenty-one thousand, two hundred twenty-two".