85231017 has 36 divisors (see below), whose sum is σ = 133631940. Its totient is φ = 52301376.

The previous prime is 85231001. The next prime is 85231019. The reversal of 85231017 is 71013258.

It can be written as a sum of positive squares in 2 ways, for example, as 44475561 + 40755456 = 6669^2 + 6384^2 .

It is not a de Polignac number, because 85231017 - 2⁴ = 85231001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85231019) 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 35 ways as a sum of consecutive naturals, for example, 119859 + ... + 120567.

Almost surely, 2^85231017 is an apocalyptic number.

It is an amenable number.

85231017 is a deficient number, since it is larger than the sum of its proper divisors (48400923).

85231017 is a wasteful number, since it uses less digits than its factorization.

85231017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 85231017 is about 9232.0646119923. The cubic root of 85231017 is about 440.0809372458.

The spelling of 85231017 in words is "eighty-five million, two hundred thirty-one thousand, seventeen".