85571099 has 4 divisors (see below), whose sum is σ = 85717464. Its totient is φ = 85424736.

The previous prime is 85571071. The next prime is 85571107. The reversal of 85571099 is 99017558.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85571099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85571029) 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, 72302 + ... + 73475.

It is an arithmetic number, because the mean of its divisors is an integer number (21429366).

Almost surely, 2^85571099 is an apocalyptic number.

85571099 is a deficient number, since it is larger than the sum of its proper divisors (146365).

85571099 is a wasteful number, since it uses less digits than its factorization.

85571099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146364.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 85571099 is about 9250.4647991331. The cubic root of 85571099 is about 440.6654857355.

The spelling of 85571099 in words is "eighty-five million, five hundred seventy-one thousand, ninety-nine".