255575681 has 2 divisors, whose sum is σ = 255575682. Its totient is φ = 255575680.

The previous prime is 255575653. The next prime is 255575713. The reversal of 255575681 is 186575552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251539600 + 4036081 = 15860^2 + 2009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255575681 is a prime.

It is a super-2 number, since 2×255575681² = 130637857437227522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255575611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127787840 + 127787841.

It is an arithmetic number, because the mean of its divisors is an integer number (127787841).

Almost surely, 2^255575681 is an apocalyptic number.

It is an amenable number.

255575681 is a deficient number, since it is larger than the sum of its proper divisors (1).

255575681 is an equidigital number, since it uses as much as digits as its factorization.

255575681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420000, while the sum is 44.

The square root of 255575681 is about 15986.7345321050. The cubic root of 255575681 is about 634.6094119782.

The spelling of 255575681 in words is "two hundred fifty-five million, five hundred seventy-five thousand, six hundred eighty-one".