521323 has 8 divisors (see below), whose sum is σ = 576576. Its totient is φ = 467400.

The previous prime is 521317. The next prime is 521329. The reversal of 521323 is 323125.

It is an interprime number because it is at equal distance from previous prime (521317) and next prime (521329).

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 521323 - 2¹³ = 513131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521297 and 521306.

It is not an unprimeable number, because it can be changed into a prime (521329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (72072).

2⁵²¹³²³ is an apocalyptic number.

521323 is a deficient number, since it is larger than the sum of its proper divisors (55253).

521323 is a wasteful number, since it uses less digits than its factorization.

521323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its digits is 180, while the sum is 16.

The square root of 521323 is about 722.0270078051. The cubic root of 521323 is about 80.4826551111.

Adding to 521323 its reverse (323125), we get a palindrome (844448).

The spelling of 521323 in words is "five hundred twenty-one thousand, three hundred twenty-three".