27221 has 4 divisors (see below), whose sum is σ = 27552. Its totient is φ = 26892.

The previous prime is 27211. The next prime is 27239. The reversal of 27221 is 12272.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27221 - 2¹⁴ = 10837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27196 and 27205.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 27221.

It is not an unprimeable number, because it can be changed into a prime (27211) 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, 80 + ... + 246.

It is an arithmetic number, because the mean of its divisors is an integer number (6888).

2²⁷²²¹ is an apocalyptic number.

It is an amenable number.

27221 is a deficient number, since it is larger than the sum of its proper divisors (331).

27221 is a wasteful number, since it uses less digits than its factorization.

27221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its digits is 56, while the sum is 14.

The square root of 27221 is about 164.9878783426. The cubic root of 27221 is about 30.0816295377.

Adding to 27221 its reverse (12272), we get a palindrome (39493).

The spelling of 27221 in words is "twenty-seven thousand, two hundred twenty-one", and thus it is an iban number.