255199591 has 2 divisors, whose sum is σ = 255199592. Its totient is φ = 255199590.

The previous prime is 255199589. The next prime is 255199643. The reversal of 255199591 is 195991552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255199591 - 2¹ = 255199589 is a prime.

Together with 255199589, 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 (255199501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127599795 + 127599796.

It is an arithmetic number, because the mean of its divisors is an integer number (127599796).

Almost surely, 2^255199591 is an apocalyptic number.

255199591 is a deficient number, since it is larger than the sum of its proper divisors (1).

255199591 is an equidigital number, since it uses as much as digits as its factorization.

255199591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 182250, while the sum is 46.

The square root of 255199591 is about 15974.9676368999. The cubic root of 255199591 is about 634.2979746515.

The spelling of 255199591 in words is "two hundred fifty-five million, one hundred ninety-nine thousand, five hundred ninety-one".