255803617 has 2 divisors, whose sum is σ = 255803618. Its totient is φ = 255803616.

The previous prime is 255803579. The next prime is 255803627. The reversal of 255803617 is 716308552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180391761 + 75411856 = 13431^2 + 8684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255803617 is a prime.

It is not a weakly prime, because it can be changed into another prime (255803627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127901808 + 127901809.

It is an arithmetic number, because the mean of its divisors is an integer number (127901809).

Almost surely, 2^255803617 is an apocalyptic number.

It is an amenable number.

255803617 is a deficient number, since it is larger than the sum of its proper divisors (1).

255803617 is an equidigital number, since it uses as much as digits as its factorization.

255803617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 255803617 is about 15993.8618538488. The cubic root of 255803617 is about 634.7980154078.

The spelling of 255803617 in words is "two hundred fifty-five million, eight hundred three thousand, six hundred seventeen".