255545161 has 2 divisors, whose sum is σ = 255545162. Its totient is φ = 255545160.

The previous prime is 255545119. The next prime is 255545189. The reversal of 255545161 is 161545552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254211136 + 1334025 = 15944^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 255545161 - 2⁹ = 255544649 is a prime.

It is not a weakly prime, because it can be changed into another prime (255545261) 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, 127772580 + 127772581.

It is an arithmetic number, because the mean of its divisors is an integer number (127772581).

Almost surely, 2^255545161 is an apocalyptic number.

It is an amenable number.

255545161 is a deficient number, since it is larger than the sum of its proper divisors (1).

255545161 is an equidigital number, since it uses as much as digits as its factorization.

255545161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 34.

The square root of 255545161 is about 15985.7799622039. The cubic root of 255545161 is about 634.5841499890.

The spelling of 255545161 in words is "two hundred fifty-five million, five hundred forty-five thousand, one hundred sixty-one".