55871 has 2 divisors, whose sum is σ = 55872. Its totient is φ = 55870.

The previous prime is 55849. The next prime is 55889. The reversal of 55871 is 17855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55871 - 2⁶ = 55807 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55171) 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, 27935 + 27936.

It is an arithmetic number, because the mean of its divisors is an integer number (27936).

2⁵⁵⁸⁷¹ is an apocalyptic number.

55871 is a deficient number, since it is larger than the sum of its proper divisors (1).

55871 is an equidigital number, since it uses as much as digits as its factorization.

55871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1400, while the sum is 26.

The square root of 55871 is about 236.3704719291. The cubic root of 55871 is about 38.2292239116.

The spelling of 55871 in words is "fifty-five thousand, eight hundred seventy-one".