51871 has 2 divisors, whose sum is σ = 51872. Its totient is φ = 51870.

The previous prime is 51869. The next prime is 51893. The reversal of 51871 is 17815.

It is an a-pointer prime, because the next prime (51893) can be obtained adding 51871 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51871 - 2¹ = 51869 is a prime.

Together with 51869, it forms a pair of twin primes.

It is a Chen prime.

51871 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25935 + 25936.

It is an arithmetic number, because the mean of its divisors is an integer number (25936).

2⁵¹⁸⁷¹ is an apocalyptic number.

51871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51871 is an equidigital number, since it uses as much as digits as its factorization.

51871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280, while the sum is 22.

The square root of 51871 is about 227.7520581685. The cubic root of 51871 is about 37.2942210139.

The spelling of 51871 in words is "fifty-one thousand, eight hundred seventy-one".