255644017 has 2 divisors, whose sum is σ = 255644018. Its totient is φ = 255644016.

The previous prime is 255643967. The next prime is 255644023. The reversal of 255644017 is 710446552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233356176 + 22287841 = 15276^2 + 4721^2 .

It is a cyclic number.

It is not a de Polignac number, because 255644017 - 2¹⁹ = 255119729 is a prime.

It is not a weakly prime, because it can be changed into another prime (255644027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127822008 + 127822009.

It is an arithmetic number, because the mean of its divisors is an integer number (127822009).

Almost surely, 2^255644017 is an apocalyptic number.

It is an amenable number.

255644017 is a deficient number, since it is larger than the sum of its proper divisors (1).

255644017 is an equidigital number, since it uses as much as digits as its factorization.

255644017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 255644017 is about 15988.8716612524. The cubic root of 255644017 is about 634.6659677037.

The spelling of 255644017 in words is "two hundred fifty-five million, six hundred forty-four thousand, seventeen".