255887971 has 2 divisors, whose sum is σ = 255887972. Its totient is φ = 255887970.

The previous prime is 255887939. The next prime is 255887977. The reversal of 255887971 is 179788552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255887971 - 2⁵ = 255887939 is a prime.

It is not a weakly prime, because it can be changed into another prime (255887977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127943985 + 127943986.

It is an arithmetic number, because the mean of its divisors is an integer number (127943986).

Almost surely, 2^255887971 is an apocalyptic number.

255887971 is a deficient number, since it is larger than the sum of its proper divisors (1).

255887971 is an equidigital number, since it uses as much as digits as its factorization.

255887971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 52.

The square root of 255887971 is about 15996.4987106554. The cubic root of 255887971 is about 634.8677849020.

The spelling of 255887971 in words is "two hundred fifty-five million, eight hundred eighty-seven thousand, nine hundred seventy-one".