255843985 has 16 divisors (see below), whose sum is σ = 314777664. Its totient is φ = 199547712.

The previous prime is 255843979. The next prime is 255844013. The reversal of 255843985 is 589348552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 255843985 - 2⁵ = 255843953 is a prime.

It is a super-2 number, since 2×255843985² = 130912289321360450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 40234 + ... + 46156.

It is an arithmetic number, because the mean of its divisors is an integer number (19673604).

Almost surely, 2^255843985 is an apocalyptic number.

It is an amenable number.

255843985 is a deficient number, since it is larger than the sum of its proper divisors (58933679).

255843985 is a wasteful number, since it uses less digits than its factorization.

255843985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6144.

The product of its digits is 1728000, while the sum is 49.

The square root of 255843985 is about 15995.1237882050. The cubic root of 255843985 is about 634.8314058380.

The spelling of 255843985 in words is "two hundred fifty-five million, eight hundred forty-three thousand, nine hundred eighty-five".