27551 has 2 divisors, whose sum is σ = 27552. Its totient is φ = 27550.

The previous prime is 27541. The next prime is 27581. The reversal of 27551 is 15572.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27551 - 2⁶ = 27487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13775 + 13776.

It is an arithmetic number, because the mean of its divisors is an integer number (13776).

2²⁷⁵⁵¹ is an apocalyptic number.

27551 is a deficient number, since it is larger than the sum of its proper divisors (1).

27551 is an equidigital number, since it uses as much as digits as its factorization.

27551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 350, while the sum is 20.

The square root of 27551 is about 165.9849390758. The cubic root of 27551 is about 30.2027013942.

The spelling of 27551 in words is "twenty-seven thousand, five hundred fifty-one".