2321 has 4 divisors (see below), whose sum is σ = 2544. Its totient is φ = 2100.

The previous prime is 2311. The next prime is 2333. The reversal of 2321 is 1232.

2321 is nontrivially palindromic in base 14.

2321 is an esthetic number in base 4 and base 10, because in such bases its adjacent digits differ by 1.

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 2321 - 2¹⁰ = 1297 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

2321 is a nontrivial repdigit in base 14.

It is a plaindrome in base 14.

It is a nialpdrome in base 8, base 14 and base 16.

It is a zygodrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 2299 and 2308.

It is not an unprimeable number, because it can be changed into a prime (2311) 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, 95 + ... + 116.

It is an arithmetic number, because the mean of its divisors is an integer number (636).

2²³²¹ is an apocalyptic number.

It is an amenable number.

2321 is a deficient number, since it is larger than the sum of its proper divisors (223).

2321 is a wasteful number, since it uses less digits than its factorization.

2321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its digits is 12, while the sum is 8.

The square root of 2321 is about 48.1767578818. The cubic root of 2321 is about 13.2401136648.

Adding to 2321 its reverse (1232), we get a palindrome (3553).

Subtracting from 2321 its reverse (1232), we obtain a square (1089 = 33²).

It can be divided in two parts, 23 and 21, that added together give a palindrome (44).

The spelling of 2321 in words is "two thousand, three hundred twenty-one", and thus it is an iban number.