27217 has 4 divisors (see below), whose sum is σ = 28836. Its totient is φ = 25600.

The previous prime is 27211. The next prime is 27239. The reversal of 27217 is 71272.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25281 + 1936 = 159^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 27217 - 2¹¹ = 25169 is a prime.

It is a Duffinian number.

27217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 27194 and 27203.

It is not an unprimeable number, because it can be changed into a prime (27211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784 + ... + 817.

It is an arithmetic number, because the mean of its divisors is an integer number (7209).

2²⁷²¹⁷ is an apocalyptic number.

It is an amenable number.

27217 is a deficient number, since it is larger than the sum of its proper divisors (1619).

27217 is a wasteful number, since it uses less digits than its factorization.

27217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618.

The product of its digits is 196, while the sum is 19.

The square root of 27217 is about 164.9757557946. The cubic root of 27217 is about 30.0801560134.

Adding to 27217 its reverse (71272), we get a palindrome (98489).

It can be divided in two parts, 272 and 17, that multiplied together give a square (4624 = 68²).

The spelling of 27217 in words is "twenty-seven thousand, two hundred seventeen", and thus it is an iban number.