2311321 has 2 divisors, whose sum is σ = 2311322. Its totient is φ = 2311320.

The previous prime is 2311289. The next prime is 2311333. The reversal of 2311321 is 1231132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1792921 + 518400 = 1339^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311321 - 2⁵ = 2311289 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (2311381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155660 + 1155661.

It is an arithmetic number, because the mean of its divisors is an integer number (1155661).

2^2311321 is an apocalyptic number.

It is an amenable number.

2311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311321 is an equidigital number, since it uses as much as digits as its factorization.

2311321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 13.

The square root of 2311321 is about 1520.3029303399. The cubic root of 2311321 is about 132.2168344620.

Adding to 2311321 its reverse (1231132), we get a palindrome (3542453).

The spelling of 2311321 in words is "two million, three hundred eleven thousand, three hundred twenty-one".