23311 has 2 divisors, whose sum is σ = 23312. Its totient is φ = 23310.

The previous prime is 23297. The next prime is 23321. The reversal of 23311 is 11332.

23311 is nontrivially palindromic in base 5.

It is an a-pointer prime, because the next prime (23321) can be obtained adding 23311 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23311 - 2⁵ = 23279 is a prime.

23311 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655 + 11656.

It is an arithmetic number, because the mean of its divisors is an integer number (11656).

2²³³¹¹ is an apocalyptic number.

23311 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311 is an equidigital number, since it uses as much as digits as its factorization.

23311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 10.

The square root of 23311 is about 152.6794026711. The cubic root of 23311 is about 28.5662764520.

Adding to 23311 its reverse (11332), we get a palindrome (34643).

It can be divided in two parts, 2331 and 1, that added together give a palindrome (2332).

The spelling of 23311 in words is "twenty-three thousand, three hundred eleven", and thus it is an iban number.