255971 has 2 divisors, whose sum is σ = 255972. Its totient is φ = 255970.

The previous prime is 255961. The next prime is 255973. The reversal of 255971 is 179552.

255971 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255971 - 2⁶ = 255907 is a prime.

Together with 255973, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 255971 parts by 715 straight cuts.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (255973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127985 + 127986.

It is an arithmetic number, because the mean of its divisors is an integer number (127986).

2²⁵⁵⁹⁷¹ is an apocalyptic number.

255971 is a deficient number, since it is larger than the sum of its proper divisors (1).

255971 is an equidigital number, since it uses as much as digits as its factorization.

255971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 29.

The square root of 255971 is about 505.9357666740. The cubic root of 255971 is about 63.4936443512.

The spelling of 255971 in words is "two hundred fifty-five thousand, nine hundred seventy-one".