255301861 has 2 divisors, whose sum is σ = 255301862. Its totient is φ = 255301860.

The previous prime is 255301859. The next prime is 255301883. The reversal of 255301861 is 168103552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205033761 + 50268100 = 14319^2 + 7090^2 .

It is a cyclic number.

It is not a de Polignac number, because 255301861 - 2¹ = 255301859 is a prime.

Together with 255301859, it forms a pair of twin primes.

It is equal to p_13953325 and since 255301861 and 13953325 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255301261) 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, 127650930 + 127650931.

It is an arithmetic number, because the mean of its divisors is an integer number (127650931).

Almost surely, 2^255301861 is an apocalyptic number.

It is an amenable number.

255301861 is a deficient number, since it is larger than the sum of its proper divisors (1).

255301861 is an equidigital number, since it uses as much as digits as its factorization.

255301861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 255301861 is about 15978.1682617251. The cubic root of 255301861 is about 634.3826939492.

The spelling of 255301861 in words is "two hundred fifty-five million, three hundred one thousand, eight hundred sixty-one".