85716231 has 4 divisors (see below), whose sum is σ = 114288312. Its totient is φ = 57144152.

The previous prime is 85716223. The next prime is 85716233. The reversal of 85716231 is 13261758.

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 85716231 - 2³ = 85716223 is a prime.

It is a super-2 number, since 2×85716231² = 14694544513690722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85716192 and 85716201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85716233) 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, 14286036 + ... + 14286041.

It is an arithmetic number, because the mean of its divisors is an integer number (28572078).

Almost surely, 2^85716231 is an apocalyptic number.

85716231 is a deficient number, since it is larger than the sum of its proper divisors (28572081).

85716231 is a wasteful number, since it uses less digits than its factorization.

85716231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28572080.

The product of its digits is 10080, while the sum is 33.

The square root of 85716231 is about 9258.3060545653. The cubic root of 85716231 is about 440.9144737759.

Adding to 85716231 its reverse (13261758), we get a palindrome (98977989).

The spelling of 85716231 in words is "eighty-five million, seven hundred sixteen thousand, two hundred thirty-one".