522221 has 8 divisors (see below), whose sum is σ = 607104. Its totient is φ = 439920.

The previous prime is 522211. The next prime is 522227. The reversal of 522221 is 122225.

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

It is a cyclic number.

It is not a de Polignac number, because 522221 - 2⁶ = 522157 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 522196 and 522205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185 + ... + 1038.

It is an arithmetic number, because the mean of its divisors is an integer number (75888).

2⁵²²²²¹ is an apocalyptic number.

It is an amenable number.

522221 is a deficient number, since it is larger than the sum of its proper divisors (84883).

522221 is a wasteful number, since it uses less digits than its factorization.

522221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its digits is 80, while the sum is 14.

The square root of 522221 is about 722.6486006352. The cubic root of 522221 is about 80.5288401480.

Adding to 522221 its reverse (122225), we get a palindrome (644446).

The spelling of 522221 in words is "five hundred twenty-two thousand, two hundred twenty-one".