85871571 has 4 divisors (see below), whose sum is σ = 114495432. Its totient is φ = 57247712.

The previous prime is 85871557. The next prime is 85871587. The reversal of 85871571 is 17517858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85871571 - 2¹¹ = 85869523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85871521) 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, 14311926 + ... + 14311931.

It is an arithmetic number, because the mean of its divisors is an integer number (28623858).

Almost surely, 2^85871571 is an apocalyptic number.

85871571 is a deficient number, since it is larger than the sum of its proper divisors (28623861).

85871571 is a wasteful number, since it uses less digits than its factorization.

85871571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28623860.

The product of its digits is 78400, while the sum is 42.

The square root of 85871571 is about 9266.6914807821. The cubic root of 85871571 is about 441.1806634279.

The spelling of 85871571 in words is "eighty-five million, eight hundred seventy-one thousand, five hundred seventy-one".