831810085 has 16 divisors (see below), whose sum is σ = 1071781632. Its totient is φ = 617478400.

The previous prime is 831810079. The next prime is 831810097. The reversal of 831810085 is 580018138.

It is not a de Polignac number, because 831810085 - 2²³ = 823421477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 831810085.

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 15 ways as a sum of consecutive naturals, for example, 62881 + ... + 74950.

It is an arithmetic number, because the mean of its divisors is an integer number (66986352).

Almost surely, 2^831810085 is an apocalyptic number.

831810085 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

831810085 is a deficient number, since it is larger than the sum of its proper divisors (239971547).

831810085 is a wasteful number, since it uses less digits than its factorization.

831810085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137924.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 831810085 is about 28841.1179568338. The cubic root of 831810085 is about 940.4623065452.

The spelling of 831810085 in words is "eight hundred thirty-one million, eight hundred ten thousand, eighty-five".