522521 has 2 divisors, whose sum is σ = 522522. Its totient is φ = 522520.

The previous prime is 522517. The next prime is 522523. The reversal of 522521 is 125225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287296 + 235225 = 536^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 522521 - 2² = 522517 is a prime.

It is a Sophie Germain prime.

Together with 522523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 522521.

It is not a weakly prime, because it can be changed into another prime (522523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261260 + 261261.

It is an arithmetic number, because the mean of its divisors is an integer number (261261).

2⁵²²⁵²¹ is an apocalyptic number.

It is an amenable number.

522521 is a deficient number, since it is larger than the sum of its proper divisors (1).

522521 is an equidigital number, since it uses as much as digits as its factorization.

522521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 17.

The square root of 522521 is about 722.8561405978. The cubic root of 522521 is about 80.5442576484.

Adding to 522521 its reverse (125225), we get a palindrome (647746).

The spelling of 522521 in words is "five hundred twenty-two thousand, five hundred twenty-one".