8112181 has 16 divisors (see below), whose sum is σ = 10200960. Its totient is φ = 6266880.

The previous prime is 8112161. The next prime is 8112187. The reversal of 8112181 is 1812118.

It is a cyclic number.

It is not a de Polignac number, because 8112181 - 2¹⁵ = 8079413 is a prime.

It is a super-2 number, since 2×8112181² = 131614961153522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8112187) 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 15 ways as a sum of consecutive naturals, for example, 10165 + ... + 10933.

It is an arithmetic number, because the mean of its divisors is an integer number (637560).

Almost surely, 2^8112181 is an apocalyptic number.

It is an amenable number.

8112181 is a deficient number, since it is larger than the sum of its proper divisors (2088779).

8112181 is a wasteful number, since it uses less digits than its factorization.

8112181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

The product of its digits is 128, while the sum is 22.

The square root of 8112181 is about 2848.1890737800. The cubic root of 8112181 is about 200.9305057480.

Adding to 8112181 its reverse (1812118), we get a palindrome (9924299).

It can be divided in two parts, 811 and 2181, that added together give a palindrome (2992).

The spelling of 8112181 in words is "eight million, one hundred twelve thousand, one hundred eighty-one".