85523171 has 4 divisors (see below), whose sum is σ = 87609144. Its totient is φ = 83437200.

The previous prime is 85523147. The next prime is 85523183. The reversal of 85523171 is 17132558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17132558 = 2 ⋅8566279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85523171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85523071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042925 + ... + 1043006.

It is an arithmetic number, because the mean of its divisors is an integer number (21902286).

Almost surely, 2^85523171 is an apocalyptic number.

85523171 is a deficient number, since it is larger than the sum of its proper divisors (2085973).

85523171 is a wasteful number, since it uses less digits than its factorization.

85523171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085972.

The product of its digits is 8400, while the sum is 32.

The square root of 85523171 is about 9247.8738637592. The cubic root of 85523171 is about 440.5831987641.

The spelling of 85523171 in words is "eighty-five million, five hundred twenty-three thousand, one hundred seventy-one".