85217611 has 2 divisors, whose sum is σ = 85217612. Its totient is φ = 85217610.

The previous prime is 85217609. The next prime is 85217621. The reversal of 85217611 is 11671258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85217611 - 2¹ = 85217609 is a prime.

Together with 85217609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85217621) 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, 42608805 + 42608806.

It is an arithmetic number, because the mean of its divisors is an integer number (42608806).

Almost surely, 2^85217611 is an apocalyptic number.

85217611 is a deficient number, since it is larger than the sum of its proper divisors (1).

85217611 is an equidigital number, since it uses as much as digits as its factorization.

85217611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 85217611 is about 9231.3385269960. The cubic root of 85217611 is about 440.0578625695.

Adding to 85217611 its reverse (11671258), we get a palindrome (96888869).

The spelling of 85217611 in words is "eighty-five million, two hundred seventeen thousand, six hundred eleven".