85231243 has 2 divisors, whose sum is σ = 85231244. Its totient is φ = 85231242.

The previous prime is 85231241. The next prime is 85231247. The reversal of 85231243 is 34213258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85231243 - 2¹ = 85231241 is a prime.

Together with 85231241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85231241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42615621 + 42615622.

It is an arithmetic number, because the mean of its divisors is an integer number (42615622).

Almost surely, 2^85231243 is an apocalyptic number.

85231243 is a deficient number, since it is larger than the sum of its proper divisors (1).

85231243 is an equidigital number, since it uses as much as digits as its factorization.

85231243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 85231243 is about 9232.0768519332. The cubic root of 85231243 is about 440.0813262208.

The spelling of 85231243 in words is "eighty-five million, two hundred thirty-one thousand, two hundred forty-three".