255602861 has 2 divisors, whose sum is σ = 255602862. Its totient is φ = 255602860.

The previous prime is 255602849. The next prime is 255602909. The reversal of 255602861 is 168206552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252015625 + 3587236 = 15875^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 255602861 - 2⁶ = 255602797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255602561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127801430 + 127801431.

It is an arithmetic number, because the mean of its divisors is an integer number (127801431).

Almost surely, 2^255602861 is an apocalyptic number.

It is an amenable number.

255602861 is a deficient number, since it is larger than the sum of its proper divisors (1).

255602861 is an equidigital number, since it uses as much as digits as its factorization.

255602861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 255602861 is about 15987.5845892993. The cubic root of 255602861 is about 634.6319076923.

The spelling of 255602861 in words is "two hundred fifty-five million, six hundred two thousand, eight hundred sixty-one".