85331 has 2 divisors, whose sum is σ = 85332.
Its totient is φ = 85330.
The previous prime is 85313. The next prime is 85333. The reversal of 85331 is 13358.
Adding to 85331 its reverse (13358), we get a palindrome (98689).
Together with previous prime (85313) it forms an Ormiston pair, because they use the same digits, order apart.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 85331 - 210 = 84307 is a prime.
It is a super-2 number, since 2×853312 = 14562759122, which contains 22 as substring.
Together with 85333, it forms a pair of twin primes.
It is a Chen prime.
It is an Ulam number.
It is a nialpdrome in base 10.
It is not a weakly prime, because it can be changed into another prime (85333) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42665 + 42666.
It is an arithmetic number, because the mean of its divisors is an integer number (42666).
285331 is an apocalyptic number.
85331 is a deficient number, since it is larger than the sum of its proper divisors (1).
85331 is an equidigital number, since it uses as much as digits as its factorization.
85331 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 360, while the sum is 20.
The square root of 85331 is about 292.1147034985.
The cubic root of 85331 is about 44.0252953724.
The spelling of 85331 in words is "eighty-five thousand, three hundred thirty-one".