85423571 has 4 divisors (see below), whose sum is σ = 85477392. Its totient is φ = 85369752.

The previous prime is 85423553. The next prime is 85423577. The reversal of 85423571 is 17532458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17532458 = 2 ⋅8766229.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85423571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85423577) 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, 24455 + ... + 27728.

It is an arithmetic number, because the mean of its divisors is an integer number (21369348).

Almost surely, 2^85423571 is an apocalyptic number.

85423571 is a deficient number, since it is larger than the sum of its proper divisors (53821).

85423571 is a wasteful number, since it uses less digits than its factorization.

85423571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53820.

The product of its digits is 33600, while the sum is 35.

The square root of 85423571 is about 9242.4872734562. The cubic root of 85423571 is about 440.4120984175.

The spelling of 85423571 in words is "eighty-five million, four hundred twenty-three thousand, five hundred seventy-one".