255505305 has 16 divisors (see below), whose sum is σ = 445973184. Its totient is φ = 123881280.

The previous prime is 255505297. The next prime is 255505307. The reversal of 255505305 is 503505552.

It is not a de Polignac number, because 255505305 - 2³ = 255505297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255505307) 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 in 15 ways as a sum of consecutive naturals, for example, 774094 + ... + 774423.

It is an arithmetic number, because the mean of its divisors is an integer number (27873324).

Almost surely, 2^255505305 is an apocalyptic number.

It is an amenable number.

255505305 is a deficient number, since it is larger than the sum of its proper divisors (190467879).

255505305 is a wasteful number, since it uses less digits than its factorization.

255505305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548536.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 255505305 is about 15984.5333056677. The cubic root of 255505305 is about 634.5511573850.

The spelling of 255505305 in words is "two hundred fifty-five million, five hundred five thousand, three hundred five".