255558449 has 2 divisors, whose sum is σ = 255558450. Its totient is φ = 255558448.

The previous prime is 255558439. The next prime is 255558491. The reversal of 255558449 is 944855552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250652224 + 4906225 = 15832^2 + 2215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255558449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (255558439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127779224 + 127779225.

It is an arithmetic number, because the mean of its divisors is an integer number (127779225).

Almost surely, 2^255558449 is an apocalyptic number.

It is an amenable number.

255558449 is a deficient number, since it is larger than the sum of its proper divisors (1).

255558449 is an equidigital number, since it uses as much as digits as its factorization.

255558449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440000, while the sum is 47.

The square root of 255558449 is about 15986.1955761838. The cubic root of 255558449 is about 634.5951489686.

The spelling of 255558449 in words is "two hundred fifty-five million, five hundred fifty-eight thousand, four hundred forty-nine".