255243161 has 2 divisors, whose sum is σ = 255243162. Its totient is φ = 255243160.

The previous prime is 255243143. The next prime is 255243187. The reversal of 255243161 is 161342552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189227536 + 66015625 = 13756^2 + 8125^2 .

It is a cyclic number.

It is not a de Polignac number, because 255243161 - 2¹⁸ = 254981017 is a prime.

It is not a weakly prime, because it can be changed into another prime (255243101) 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, 127621580 + 127621581.

It is an arithmetic number, because the mean of its divisors is an integer number (127621581).

Almost surely, 2^255243161 is an apocalyptic number.

It is an amenable number.

255243161 is a deficient number, since it is larger than the sum of its proper divisors (1).

255243161 is an equidigital number, since it uses as much as digits as its factorization.

255243161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 255243161 is about 15976.3312747326. The cubic root of 255243161 is about 634.3340703078.

The spelling of 255243161 in words is "two hundred fifty-five million, two hundred forty-three thousand, one hundred sixty-one".