255671971 has 2 divisors, whose sum is σ = 255671972. Its totient is φ = 255671970.

The previous prime is 255671939. The next prime is 255671981. The reversal of 255671971 is 179176552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255671971 - 2⁵ = 255671939 is a prime.

It is not a weakly prime, because it can be changed into another prime (255671981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127835985 + 127835986.

It is an arithmetic number, because the mean of its divisors is an integer number (127835986).

Almost surely, 2^255671971 is an apocalyptic number.

255671971 is a deficient number, since it is larger than the sum of its proper divisors (1).

255671971 is an equidigital number, since it uses as much as digits as its factorization.

255671971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 43.

The square root of 255671971 is about 15989.7458078607. The cubic root of 255671971 is about 634.6890998780.

The spelling of 255671971 in words is "two hundred fifty-five million, six hundred seventy-one thousand, nine hundred seventy-one".