85431111 has 4 divisors (see below), whose sum is σ = 113908152. Its totient is φ = 56954072.

The previous prime is 85431107. The next prime is 85431127. The reversal of 85431111 is 11113458.

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 85431111 - 2² = 85431107 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85439111) 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, 14238516 + ... + 14238521.

It is an arithmetic number, because the mean of its divisors is an integer number (28477038).

Almost surely, 2^85431111 is an apocalyptic number.

85431111 is a deficient number, since it is larger than the sum of its proper divisors (28477041).

85431111 is a wasteful number, since it uses less digits than its factorization.

85431111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28477040.

The product of its digits is 480, while the sum is 24.

The square root of 85431111 is about 9242.8951633133. The cubic root of 85431111 is about 440.4250558463.

Adding to 85431111 its reverse (11113458), we get a palindrome (96544569).

The spelling of 85431111 in words is "eighty-five million, four hundred thirty-one thousand, one hundred eleven".