255236791 has 2 divisors, whose sum is σ = 255236792. Its totient is φ = 255236790.

The previous prime is 255236753. The next prime is 255236809. The reversal of 255236791 is 197632552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255236791 - 2¹⁹ = 254712503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255236741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127618395 + 127618396.

It is an arithmetic number, because the mean of its divisors is an integer number (127618396).

Almost surely, 2^255236791 is an apocalyptic number.

255236791 is a deficient number, since it is larger than the sum of its proper divisors (1).

255236791 is an equidigital number, since it uses as much as digits as its factorization.

255236791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 255236791 is about 15976.1319160803. The cubic root of 255236791 is about 634.3287933245.

The spelling of 255236791 in words is "two hundred fifty-five million, two hundred thirty-six thousand, seven hundred ninety-one".