255243091 has 2 divisors, whose sum is σ = 255243092. Its totient is φ = 255243090.

The previous prime is 255243089. The next prime is 255243101. The reversal of 255243091 is 190342552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255243091 - 2¹ = 255243089 is a prime.

Together with 255243089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255244091) 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, 127621545 + 127621546.

It is an arithmetic number, because the mean of its divisors is an integer number (127621546).

Almost surely, 2^255243091 is an apocalyptic number.

255243091 is a deficient number, since it is larger than the sum of its proper divisors (1).

255243091 is an equidigital number, since it uses as much as digits as its factorization.

255243091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 255243091 is about 15976.3290839917. The cubic root of 255243091 is about 634.3340123194.

The spelling of 255243091 in words is "two hundred fifty-five million, two hundred forty-three thousand, ninety-one".