851085185 has 16 divisors (see below), whose sum is σ = 1064145600. Its totient is φ = 652645056.

The previous prime is 851085181. The next prime is 851085199. The reversal of 851085185 is 581580158.

It is a cyclic number.

It is not a de Polignac number, because 851085185 - 2² = 851085181 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851085181) 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, 959 + ... + 41268.

It is an arithmetic number, because the mean of its divisors is an integer number (66509100).

Almost surely, 2^851085185 is an apocalyptic number.

It is an amenable number.

851085185 is a deficient number, since it is larger than the sum of its proper divisors (213060415).

851085185 is a wasteful number, since it uses less digits than its factorization.

851085185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42400.

The product of its (nonzero) digits is 64000, while the sum is 41.

The square root of 851085185 is about 29173.3643071895. The cubic root of 851085185 is about 947.6711878251.

The spelling of 851085185 in words is "eight hundred fifty-one million, eighty-five thousand, one hundred eighty-five".