85211311 has 2 divisors, whose sum is σ = 85211312. Its totient is φ = 85211310.

The previous prime is 85211239. The next prime is 85211341. The reversal of 85211311 is 11311258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85211311 - 2⁷ = 85211183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85211341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42605655 + 42605656.

It is an arithmetic number, because the mean of its divisors is an integer number (42605656).

Almost surely, 2^85211311 is an apocalyptic number.

85211311 is a deficient number, since it is larger than the sum of its proper divisors (1).

85211311 is an equidigital number, since it uses as much as digits as its factorization.

85211311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 85211311 is about 9230.9972917340. The cubic root of 85211311 is about 440.0470180471.

Adding to 85211311 its reverse (11311258), we get a palindrome (96522569).

The spelling of 85211311 in words is "eighty-five million, two hundred eleven thousand, three hundred eleven".