27311 has 4 divisors (see below), whose sum is σ = 28224. Its totient is φ = 26400.

The previous prime is 27299. The next prime is 27329. The reversal of 27311 is 11372.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27311 is a prime.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27361) 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, 410 + ... + 471.

It is an arithmetic number, because the mean of its divisors is an integer number (7056).

2²⁷³¹¹ is an apocalyptic number.

27311 is a deficient number, since it is larger than the sum of its proper divisors (913).

27311 is an equidigital number, since it uses as much as digits as its factorization.

27311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its digits is 42, while the sum is 14.

The square root of 27311 is about 165.2604005804. The cubic root of 27311 is about 30.1147457395.

Adding to 27311 its reverse (11372), we get a palindrome (38683).

It can be divided in two parts, 273 and 11, that multiplied together give a palindrome (3003).

The spelling of 27311 in words is "twenty-seven thousand, three hundred eleven", and thus it is an iban number.