85570571 has 16 divisors (see below), whose sum is σ = 93991680. Its totient is φ = 77552640.

The previous prime is 85570543. The next prime is 85570577. The reversal of 85570571 is 17507558.

It is a de Polignac number, because none of the positive numbers 2^k-85570571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85570577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209015 + ... + 209423.

It is an arithmetic number, because the mean of its divisors is an integer number (5874480).

Almost surely, 2^85570571 is an apocalyptic number.

85570571 is a deficient number, since it is larger than the sum of its proper divisors (8421109).

85570571 is a wasteful number, since it uses less digits than its factorization.

85570571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854.

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 85570571 is about 9250.4362599826. The cubic root of 85570571 is about 440.6645793865.

The spelling of 85570571 in words is "eighty-five million, five hundred seventy thousand, five hundred seventy-one".