522321 has 8 divisors (see below), whose sum is σ = 712800. Its totient is φ = 340032.

The previous prime is 522317. The next prime is 522323. The reversal of 522321 is 123225.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 522321 - 2² = 522317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 522321.

It is not an unprimeable number, because it can be changed into a prime (522323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1896 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (89100).

2⁵²²³²¹ is an apocalyptic number.

It is an amenable number.

522321 is a deficient number, since it is larger than the sum of its proper divisors (190479).

522321 is a wasteful number, since it uses less digits than its factorization.

522321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095.

The product of its digits is 120, while the sum is 15.

The square root of 522321 is about 722.7177872448. The cubic root of 522321 is about 80.5339799707.

Adding to 522321 its reverse (123225), we get a palindrome (645546).

The spelling of 522321 in words is "five hundred twenty-two thousand, three hundred twenty-one".