85612191 has 16 divisors (see below), whose sum is σ = 133983744. Its totient is φ = 47598624.

The previous prime is 85612181. The next prime is 85612207. The reversal of 85612191 is 19121658.

It is not a de Polignac number, because 85612191 - 2⁵ = 85612159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85612171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54315 + ... + 55868.

It is an arithmetic number, because the mean of its divisors is an integer number (8373984).

Almost surely, 2^85612191 is an apocalyptic number.

85612191 is a deficient number, since it is larger than the sum of its proper divisors (48371553).

85612191 is a wasteful number, since it uses less digits than its factorization.

85612191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110230.

The product of its digits is 4320, while the sum is 33.

The square root of 85612191 is about 9252.6856101350. The cubic root of 85612191 is about 440.7360116047.

The spelling of 85612191 in words is "eighty-five million, six hundred twelve thousand, one hundred ninety-one".