85051271 has 4 divisors (see below), whose sum is σ = 87349992. Its totient is φ = 82752552.

The previous prime is 85051237. The next prime is 85051297. The reversal of 85051271 is 17215058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85051271 - 2¹⁰ = 85050247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85051231) 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 3 ways as a sum of consecutive naturals, for example, 1149305 + ... + 1149378.

It is an arithmetic number, because the mean of its divisors is an integer number (21837498).

Almost surely, 2^85051271 is an apocalyptic number.

85051271 is a deficient number, since it is larger than the sum of its proper divisors (2298721).

85051271 is a wasteful number, since it uses less digits than its factorization.

85051271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298720.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 85051271 is about 9222.3245984947. The cubic root of 85051271 is about 439.7713533114.

The spelling of 85051271 in words is "eighty-five million, fifty-one thousand, two hundred seventy-one".