255768517 has 2 divisors, whose sum is σ = 255768518. Its totient is φ = 255768516.

The previous prime is 255768511. The next prime is 255768523. The reversal of 255768517 is 715867552.

It is a balanced prime because it is at equal distance from previous prime (255768511) and next prime (255768523).

It can be written as a sum of positive squares in only one way, i.e., 187854436 + 67914081 = 13706^2 + 8241^2 .

It is a cyclic number.

It is not a de Polignac number, because 255768517 - 2⁷ = 255768389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255768511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127884258 + 127884259.

It is an arithmetic number, because the mean of its divisors is an integer number (127884259).

Almost surely, 2^255768517 is an apocalyptic number.

It is an amenable number.

255768517 is a deficient number, since it is larger than the sum of its proper divisors (1).

255768517 is an equidigital number, since it uses as much as digits as its factorization.

255768517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588000, while the sum is 46.

The square root of 255768517 is about 15992.7645202448. The cubic root of 255768517 is about 634.7689795537.

The spelling of 255768517 in words is "two hundred fifty-five million, seven hundred sixty-eight thousand, five hundred seventeen".