255866291 has 2 divisors, whose sum is σ = 255866292. Its totient is φ = 255866290.

The previous prime is 255866287. The next prime is 255866323. The reversal of 255866291 is 192668552.

255866291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255866291 - 2² = 255866287 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255866791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127933145 + 127933146.

It is an arithmetic number, because the mean of its divisors is an integer number (127933146).

Almost surely, 2^255866291 is an apocalyptic number.

255866291 is a deficient number, since it is larger than the sum of its proper divisors (1).

255866291 is an equidigital number, since it uses as much as digits as its factorization.

255866291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The square root of 255866291 is about 15995.8210480113. The cubic root of 255866291 is about 634.8498547609.

The spelling of 255866291 in words is "two hundred fifty-five million, eight hundred sixty-six thousand, two hundred ninety-one".