255564173 has 2 divisors, whose sum is σ = 255564174. Its totient is φ = 255564172.

The previous prime is 255564163. The next prime is 255564203. The reversal of 255564173 is 371465552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250842244 + 4721929 = 15838^2 + 2173^2 .

It is a cyclic number.

It is not a de Polignac number, because 255564173 - 2¹² = 255560077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255564103) 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, 127782086 + 127782087.

It is an arithmetic number, because the mean of its divisors is an integer number (127782087).

Almost surely, 2^255564173 is an apocalyptic number.

It is an amenable number.

255564173 is a deficient number, since it is larger than the sum of its proper divisors (1).

255564173 is an equidigital number, since it uses as much as digits as its factorization.

255564173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 38.

The square root of 255564173 is about 15986.3746046438. The cubic root of 255564173 is about 634.5998868221.

The spelling of 255564173 in words is "two hundred fifty-five million, five hundred sixty-four thousand, one hundred seventy-three".