813048185 has 8 divisors (see below), whose sum is σ = 975821256. Its totient is φ = 650329600.

The previous prime is 813048179. The next prime is 813048211. The reversal of 813048185 is 581840318.

It can be written as a sum of positive squares in 4 ways, for example, as 320696464 + 492351721 = 17908^2 + 22189^2 .

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

It is not a de Polignac number, because 813048185 - 2⁴ = 813048169 is a prime.

It is a super-2 number, since 2×813048185² = 1322094702263588450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34985 + ... + 53385.

It is an arithmetic number, because the mean of its divisors is an integer number (121977657).

Almost surely, 2^813048185 is an apocalyptic number.

It is an amenable number.

813048185 is a deficient number, since it is larger than the sum of its proper divisors (162773071).

813048185 is a wasteful number, since it uses less digits than its factorization.

813048185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27243.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 813048185 is about 28513.9998071123. Note that the first 3 decimals coincide. The cubic root of 813048185 is about 933.3375991160.

The spelling of 813048185 in words is "eight hundred thirteen million, forty-eight thousand, one hundred eighty-five".