255517417 has 2 divisors, whose sum is σ = 255517418. Its totient is φ = 255517416.

The previous prime is 255517411. The next prime is 255517421. The reversal of 255517417 is 714715552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253096281 + 2421136 = 15909^2 + 1556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255517417 is a prime.

It is not a weakly prime, because it can be changed into another prime (255517411) 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, 127758708 + 127758709.

It is an arithmetic number, because the mean of its divisors is an integer number (127758709).

Almost surely, 2^255517417 is an apocalyptic number.

It is an amenable number.

255517417 is a deficient number, since it is larger than the sum of its proper divisors (1).

255517417 is an equidigital number, since it uses as much as digits as its factorization.

255517417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49000, while the sum is 37.

The square root of 255517417 is about 15984.9121674159. The cubic root of 255517417 is about 634.5611840029.

The spelling of 255517417 in words is "two hundred fifty-five million, five hundred seventeen thousand, four hundred seventeen".