8256231985 has 32 divisors (see below), whose sum is σ = 11024525952. Its totient is φ = 5907686400.

The previous prime is 8256231967. The next prime is 8256232003. The reversal of 8256231985 is 5891326528.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8256231967) and next prime (8256232003).

It is not a de Polignac number, because 8256231985 - 2⁷ = 8256231857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104710 + ... + 165760.

It is an arithmetic number, because the mean of its divisors is an integer number (344516436).

Almost surely, 2^8256231985 is an apocalyptic number.

8256231985 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8256231985 is a deficient number, since it is larger than the sum of its proper divisors (2768293967).

8256231985 is a wasteful number, since it uses less digits than its factorization.

8256231985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61153.

The product of its digits is 1036800, while the sum is 49.

The square root of 8256231985 is about 90863.8100951088. The cubic root of 8256231985 is about 2021.1286690656.

The spelling of 8256231985 in words is "eight billion, two hundred fifty-six million, two hundred thirty-one thousand, nine hundred eighty-five".