85231161 has 12 divisors (see below), whose sum is σ = 124308288. Its totient is φ = 56268504.

The previous prime is 85231151. The next prime is 85231187. The reversal of 85231161 is 16113258.

It is not a de Polignac number, because 85231161 - 2¹⁹ = 84706873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85231141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45045 + ... + 46898.

It is an arithmetic number, because the mean of its divisors is an integer number (10359024).

Almost surely, 2^85231161 is an apocalyptic number.

It is an amenable number.

85231161 is a deficient number, since it is larger than the sum of its proper divisors (39077127).

85231161 is a wasteful number, since it uses less digits than its factorization.

85231161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92052 (or 92049 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 85231161 is about 9232.0724108945. The cubic root of 85231161 is about 440.0811850884.

The spelling of 85231161 in words is "eighty-five million, two hundred thirty-one thousand, one hundred sixty-one".