255555361 has 2 divisors, whose sum is σ = 255555362. Its totient is φ = 255555360.

The previous prime is 255555281. The next prime is 255555367. The reversal of 255555361 is 163555552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204347025 + 51208336 = 14295^2 + 7156^2 .

It is a cyclic number.

It is not a de Polignac number, because 255555361 - 2⁷ = 255555233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255555361.

It is not a weakly prime, because it can be changed into another prime (255555367) 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, 127777680 + 127777681.

It is an arithmetic number, because the mean of its divisors is an integer number (127777681).

Almost surely, 2^255555361 is an apocalyptic number.

It is an amenable number.

255555361 is a deficient number, since it is larger than the sum of its proper divisors (1).

255555361 is an equidigital number, since it uses as much as digits as its factorization.

255555361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112500, while the sum is 37.

The square root of 255555361 is about 15986.0989925623. The cubic root of 255555361 is about 634.5925929483.

The spelling of 255555361 in words is "two hundred fifty-five million, five hundred fifty-five thousand, three hundred sixty-one".