522821 has 8 divisors (see below), whose sum is σ = 569184. Its totient is φ = 477360.

The previous prime is 522811. The next prime is 522827. The reversal of 522821 is 128225.

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

It is not a de Polignac number, because 522821 - 2⁶ = 522757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 522793 and 522802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522827) 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, 1550 + ... + 1856.

It is an arithmetic number, because the mean of its divisors is an integer number (71148).

2⁵²²⁸²¹ is an apocalyptic number.

It is an amenable number.

522821 is a deficient number, since it is larger than the sum of its proper divisors (46363).

522821 is a wasteful number, since it uses less digits than its factorization.

522821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its digits is 320, while the sum is 20.

The square root of 522821 is about 723.0636209906. The cubic root of 522821 is about 80.5596692487.

The spelling of 522821 in words is "five hundred twenty-two thousand, eight hundred twenty-one".