85285681 has 24 divisors (see below), whose sum is σ = 97069056. Its totient is φ = 74805120.

The previous prime is 85285667. The next prime is 85285687. The reversal of 85285681 is 18658258.

It is not a de Polignac number, because 85285681 - 2⁵ = 85285649 is a prime.

It is a super-2 number, since 2×85285681² = 14547294767267522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85285687) 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 23 ways as a sum of consecutive naturals, for example, 382336 + ... + 382558.

It is an arithmetic number, because the mean of its divisors is an integer number (4044544).

Almost surely, 2^85285681 is an apocalyptic number.

It is an amenable number.

85285681 is a deficient number, since it is larger than the sum of its proper divisors (11783375).

85285681 is a wasteful number, since it uses less digits than its factorization.

85285681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 340 counting only the distinct ones).

The product of its digits is 153600, while the sum is 43.

The square root of 85285681 is about 9235.0246886514. The cubic root of 85285681 is about 440.1750009800.

The spelling of 85285681 in words is "eighty-five million, two hundred eighty-five thousand, six hundred eighty-one".