522340221 has 16 divisors (see below), whose sum is σ = 767471936. Its totient is φ = 313963776.

The previous prime is 522340207. The next prime is 522340223. The reversal of 522340221 is 122043225.

It is not a de Polignac number, because 522340221 - 2⁹ = 522339709 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 (522340223) 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, 154060 + ... + 157413.

It is an arithmetic number, because the mean of its divisors is an integer number (47966996).

Almost surely, 2^522340221 is an apocalyptic number.

It is an amenable number.

522340221 is a deficient number, since it is larger than the sum of its proper divisors (245131715).

522340221 is a wasteful number, since it uses less digits than its factorization.

522340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311532.

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

The square root of 522340221 is about 22854.7636391191. The cubic root of 522340221 is about 805.3496782087.

Adding to 522340221 its reverse (122043225), we get a palindrome (644383446).

The spelling of 522340221 in words is "five hundred twenty-two million, three hundred forty thousand, two hundred twenty-one".