255606569 has 2 divisors, whose sum is σ = 255606570. Its totient is φ = 255606568.

The previous prime is 255606529. The next prime is 255606583. The reversal of 255606569 is 965606552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238300969 + 17305600 = 15437^2 + 4160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255606569 is a prime.

It is a super-2 number, since 2×255606569² = 130669436231903522, which contains 22 as substring.

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 (255606529) 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, 127803284 + 127803285.

It is an arithmetic number, because the mean of its divisors is an integer number (127803285).

Almost surely, 2^255606569 is an apocalyptic number.

It is an amenable number.

255606569 is a deficient number, since it is larger than the sum of its proper divisors (1).

255606569 is an equidigital number, since it uses as much as digits as its factorization.

255606569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 44.

The square root of 255606569 is about 15987.7005538633. The cubic root of 255606569 is about 634.6349765204.

The spelling of 255606569 in words is "two hundred fifty-five million, six hundred six thousand, five hundred sixty-nine".