27563 has 4 divisors (see below), whose sum is σ = 28248. Its totient is φ = 26880.
The previous prime is 27551. The next prime is 27581. The reversal of 27563 is 36572.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 27563 - 210 = 26539 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (27583) 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, 278 + ... + 363.
It is an arithmetic number, because the mean of its divisors is an integer number (7062).
227563 is an apocalyptic number.
27563 is a deficient number, since it is larger than the sum of its proper divisors (685).
27563 is an equidigital number, since it uses as much as digits as its factorization.
27563 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 684.
The product of its digits is 1260, while the sum is 23.
The square root of 27563 is about 166.0210829985. The cubic root of 27563 is about 30.2070857458.
Subtracting 27563 from its reverse (36572), we obtain a palindrome (9009).
The spelling of 27563 in words is "twenty-seven thousand, five hundred sixty-three".
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