255061321 has 2 divisors, whose sum is σ = 255061322. Its totient is φ = 255061320.

The previous prime is 255061291. The next prime is 255061361. The reversal of 255061321 is 123160552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166023225 + 89038096 = 12885^2 + 9436^2 .

It is a cyclic number.

It is not a de Polignac number, because 255061321 - 2⁷ = 255061193 is a prime.

It is not a weakly prime, because it can be changed into another prime (255061361) 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, 127530660 + 127530661.

It is an arithmetic number, because the mean of its divisors is an integer number (127530661).

Almost surely, 2^255061321 is an apocalyptic number.

It is an amenable number.

255061321 is a deficient number, since it is larger than the sum of its proper divisors (1).

255061321 is an equidigital number, since it uses as much as digits as its factorization.

255061321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 255061321 is about 15970.6393422430. The cubic root of 255061321 is about 634.1833973709.

The spelling of 255061321 in words is "two hundred fifty-five million, sixty-one thousand, three hundred twenty-one".