812882181 has 8 divisors (see below), whose sum is σ = 1084457920. Its totient is φ = 541613952.

The previous prime is 812882179. The next prime is 812882197. The reversal of 812882181 is 181288218.

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

It is not a de Polignac number, because 812882181 - 2¹ = 812882179 is a prime.

It is a super-2 number, since 2×812882181² = 1321554880374633522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812882171) 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 7 ways as a sum of consecutive naturals, for example, 70636 + ... + 81333.

It is an arithmetic number, because the mean of its divisors is an integer number (135557240).

Almost surely, 2^812882181 is an apocalyptic number.

It is an amenable number.

812882181 is a deficient number, since it is larger than the sum of its proper divisors (271575739).

812882181 is a wasteful number, since it uses less digits than its factorization.

812882181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153755.

The product of its digits is 16384, while the sum is 39.

The square root of 812882181 is about 28511.0887375421. The cubic root of 812882181 is about 933.2740734342.

It can be divided in two parts, 8128 and 82181, that added together give a palindrome (90309).

The spelling of 812882181 in words is "eight hundred twelve million, eight hundred eighty-two thousand, one hundred eighty-one".