255881971 has 2 divisors, whose sum is σ = 255881972. Its totient is φ = 255881970.

The previous prime is 255881963. The next prime is 255882017. The reversal of 255881971 is 179188552.

It is an a-pointer prime, because the next prime (255882017) can be obtained adding 255881971 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255881971 - 2³ = 255881963 is a prime.

It is not a weakly prime, because it can be changed into another prime (255887971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127940985 + 127940986.

It is an arithmetic number, because the mean of its divisors is an integer number (127940986).

Almost surely, 2^255881971 is an apocalyptic number.

255881971 is a deficient number, since it is larger than the sum of its proper divisors (1).

255881971 is an equidigital number, since it uses as much as digits as its factorization.

255881971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 46.

The square root of 255881971 is about 15996.3111685163. The cubic root of 255881971 is about 634.8628227872.

The spelling of 255881971 in words is "two hundred fifty-five million, eight hundred eighty-one thousand, nine hundred seventy-one".