23321 has 2 divisors, whose sum is σ = 23322. Its totient is φ = 23320.

The previous prime is 23311. The next prime is 23327. The reversal of 23321 is 12332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19600 + 3721 = 140^2 + 61^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (23327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660 + 11661.

It is an arithmetic number, because the mean of its divisors is an integer number (11661).

2²³³²¹ is an apocalyptic number.

It is an amenable number.

23321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23321 is an equidigital number, since it uses as much as digits as its factorization.

23321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 11.

The square root of 23321 is about 152.7121475194. The cubic root of 23321 is about 28.5703606744.

Adding to 23321 its sum of digits (11), we get a palindrome (23332).

Adding to 23321 its reverse (12332), we get a palindrome (35653).

The spelling of 23321 in words is "twenty-three thousand, three hundred twenty-one", and thus it is an iban number.