85812881 has 16 divisors (see below), whose sum is σ = 108349440. Its totient is φ = 66016080.

The previous prime is 85812833. The next prime is 85812913. The reversal of 85812881 is 18821858.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85812881 is a prime.

It is a super-2 number, since 2×85812881² = 14727701091040322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82812881) by changing a digit.

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, 971 + ... + 13136.

It is an arithmetic number, because the mean of its divisors is an integer number (6771840).

Almost surely, 2^85812881 is an apocalyptic number.

It is an amenable number.

85812881 is a deficient number, since it is larger than the sum of its proper divisors (22536559).

85812881 is a wasteful number, since it uses less digits than its factorization.

85812881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14204.

The product of its digits is 40960, while the sum is 41.

The square root of 85812881 is about 9263.5242213749. The cubic root of 85812881 is about 441.0801303721.

The spelling of 85812881 in words is "eighty-five million, eight hundred twelve thousand, eight hundred eighty-one".