255027991 has 2 divisors, whose sum is σ = 255027992. Its totient is φ = 255027990.

The previous prime is 255027989. The next prime is 255028003. The reversal of 255027991 is 199720552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255027991 - 2¹ = 255027989 is a prime.

Together with 255027989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255027961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127513995 + 127513996.

It is an arithmetic number, because the mean of its divisors is an integer number (127513996).

Almost surely, 2^255027991 is an apocalyptic number.

255027991 is a deficient number, since it is larger than the sum of its proper divisors (1).

255027991 is an equidigital number, since it uses as much as digits as its factorization.

255027991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 255027991 is about 15969.5958308280. The cubic root of 255027991 is about 634.1557723102.

The spelling of 255027991 in words is "two hundred fifty-five million, twenty-seven thousand, nine hundred ninety-one".