521822 has 8 divisors (see below), whose sum is σ = 894576. Its totient is φ = 223632.

The previous prime is 521819. The next prime is 521831. The reversal of 521822 is 228125.

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

It is a junction number, because it is equal to n+sod(n) for n = 521794 and 521803.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521822.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18623 + ... + 18650.

It is an arithmetic number, because the mean of its divisors is an integer number (111822).

2⁵²¹⁸²² is an apocalyptic number.

521822 is a deficient number, since it is larger than the sum of its proper divisors (372754).

521822 is a wasteful number, since it uses less digits than its factorization.

521822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37282.

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

The square root of 521822 is about 722.3724800960. The cubic root of 521822 is about 80.5083257209.

Adding to 521822 its reverse (228125), we get a palindrome (749947).

The spelling of 521822 in words is "five hundred twenty-one thousand, eight hundred twenty-two".