85170051 has 24 divisors (see below), whose sum is σ = 134469504. Its totient is φ = 51713280.

The previous prime is 85170047. The next prime is 85170061. The reversal of 85170051 is 15007158.

It is not a de Polignac number, because 85170051 - 2² = 85170047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85169997 and 85170024.

It is not an unprimeable number, because it can be changed into a prime (85170011) 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 23 ways as a sum of consecutive naturals, for example, 4236 + ... + 13721.

It is an arithmetic number, because the mean of its divisors is an integer number (5602896).

Almost surely, 2^85170051 is an apocalyptic number.

85170051 is a deficient number, since it is larger than the sum of its proper divisors (49299453).

85170051 is a wasteful number, since it uses less digits than its factorization.

85170051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18011 (or 18008 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 85170051 is about 9228.7621596832. The cubic root of 85170051 is about 439.9759818157.

The spelling of 85170051 in words is "eighty-five million, one hundred seventy thousand, fifty-one".