255596681 has 2 divisors, whose sum is σ = 255596682. Its totient is φ = 255596680.

The previous prime is 255596617. The next prime is 255596689. The reversal of 255596681 is 186695552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248220025 + 7376656 = 15755^2 + 2716^2 .

It is a cyclic number.

It is not a de Polignac number, because 255596681 - 2⁶ = 255596617 is a prime.

It is a super-2 number, since 2×255596681² = 130659326676431522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255596689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127798340 + 127798341.

It is an arithmetic number, because the mean of its divisors is an integer number (127798341).

Almost surely, 2^255596681 is an apocalyptic number.

It is an amenable number.

255596681 is a deficient number, since it is larger than the sum of its proper divisors (1).

255596681 is an equidigital number, since it uses as much as digits as its factorization.

255596681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 47.

The square root of 255596681 is about 15987.3913131568. The cubic root of 255596681 is about 634.6267929129.

The spelling of 255596681 in words is "two hundred fifty-five million, five hundred ninety-six thousand, six hundred eighty-one".