85139211 has 8 divisors (see below), whose sum is σ = 113690320. Its totient is φ = 56673792.

The previous prime is 85139207. The next prime is 85139227. The reversal of 85139211 is 11293158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85139211 - 2² = 85139207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85139311) 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 in 7 ways as a sum of consecutive naturals, for example, 19066 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (14211290).

Almost surely, 2^85139211 is an apocalyptic number.

85139211 is a deficient number, since it is larger than the sum of its proper divisors (28551109).

85139211 is a wasteful number, since it uses less digits than its factorization.

85139211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42845.

The product of its digits is 2160, while the sum is 30.

The square root of 85139211 is about 9227.0911451009. The cubic root of 85139211 is about 439.9228704336.

The spelling of 85139211 in words is "eighty-five million, one hundred thirty-nine thousand, two hundred eleven".