523221 has 4 divisors (see below), whose sum is σ = 697632. Its totient is φ = 348812.

The previous prime is 523219. The next prime is 523261. The reversal of 523221 is 122325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 523221 - 2¹ = 523219 is a prime.

It is a d-powerful number, because it can be written as 5⁸ + 2⁸ + 2¹⁰ + 3⁵ + 2¹⁷ + 1 .

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 523221.

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 523221.

It is not an unprimeable number, because it can be changed into a prime (523261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87201 + ... + 87206.

It is an arithmetic number, because the mean of its divisors is an integer number (174408).

2⁵²³²²¹ is an apocalyptic number.

It is an amenable number.

523221 is a deficient number, since it is larger than the sum of its proper divisors (174411).

523221 is a wasteful number, since it uses less digits than its factorization.

523221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174410.

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

The square root of 523221 is about 723.3401689385. The cubic root of 523221 is about 80.5802088809.

Adding to 523221 its reverse (122325), we get a palindrome (645546).

It can be divided in two parts, 5232 and 21, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 523221 in words is "five hundred twenty-three thousand, two hundred twenty-one".