255305685 has 16 divisors (see below), whose sum is σ = 415414080. Its totient is φ = 133854720.

The previous prime is 255305683. The next prime is 255305719. The reversal of 255305685 is 586503552.

It is not a de Polignac number, because 255305685 - 2¹ = 255305683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255305683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143356 + ... + 145125.

It is an arithmetic number, because the mean of its divisors is an integer number (25963380).

Almost surely, 2^255305685 is an apocalyptic number.

It is an amenable number.

255305685 is a deficient number, since it is larger than the sum of its proper divisors (160108395).

255305685 is a wasteful number, since it uses less digits than its factorization.

255305685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288548.

The product of its (nonzero) digits is 180000, while the sum is 39.

The square root of 255305685 is about 15978.2879245556. The cubic root of 255305685 is about 634.3858612683.

The spelling of 255305685 in words is "two hundred fifty-five million, three hundred five thousand, six hundred eighty-five".