255206717 has 2 divisors, whose sum is σ = 255206718. Its totient is φ = 255206716.

The previous prime is 255206687. The next prime is 255206719. The reversal of 255206717 is 717602552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206611876 + 48594841 = 14374^2 + 6971^2 .

It is a cyclic number.

It is not a de Polignac number, because 255206717 - 2²⁰ = 254158141 is a prime.

Together with 255206719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255206719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127603358 + 127603359.

It is an arithmetic number, because the mean of its divisors is an integer number (127603359).

Almost surely, 2^255206717 is an apocalyptic number.

It is an amenable number.

255206717 is a deficient number, since it is larger than the sum of its proper divisors (1).

255206717 is an equidigital number, since it uses as much as digits as its factorization.

255206717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 255206717 is about 15975.1906717886. The cubic root of 255206717 is about 634.3038784819.

The spelling of 255206717 in words is "two hundred fifty-five million, two hundred six thousand, seven hundred seventeen".