255000685 has 4 divisors (see below), whose sum is σ = 306000828. Its totient is φ = 204000544.

The previous prime is 255000661. The next prime is 255000769. The reversal of 255000685 is 586000552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119836809 + 135163876 = 10947^2 + 11626^2 .

It is a cyclic number.

It is not a de Polignac number, because 255000685 - 2¹⁵ = 254967917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 25500064 + ... + 25500073.

It is an arithmetic number, because the mean of its divisors is an integer number (76500207).

Almost surely, 2^255000685 is an apocalyptic number.

It is an amenable number.

255000685 is a deficient number, since it is larger than the sum of its proper divisors (51000143).

255000685 is an equidigital number, since it uses as much as digits as its factorization.

255000685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51000142.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 255000685 is about 15968.7408708389. The cubic root of 255000685 is about 634.1331383560.

The spelling of 255000685 in words is "two hundred fifty-five million, six hundred eighty-five", and thus it is an aban number.