8161181 has 8 divisors (see below), whose sum is σ = 9455424. Its totient is φ = 6899040.

The previous prime is 8161121. The next prime is 8161183. The reversal of 8161181 is 1811618.

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

It is a cyclic number.

It is not a de Polignac number, because 8161181 - 2¹⁰ = 8160157 is a prime.

It is a super-2 number, since 2×8161181² = 133209750629522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8161181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7475 + ... + 8496.

It is an arithmetic number, because the mean of its divisors is an integer number (1181928).

Almost surely, 2^8161181 is an apocalyptic number.

It is an amenable number.

8161181 is a deficient number, since it is larger than the sum of its proper divisors (1294243).

8161181 is a wasteful number, since it uses less digits than its factorization.

8161181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16051.

The product of its digits is 384, while the sum is 26.

The square root of 8161181 is about 2856.7780802856. The cubic root of 8161181 is about 201.3342540368.

Adding to 8161181 its reverse (1811618), we get a palindrome (9972799).

The spelling of 8161181 in words is "eight million, one hundred sixty-one thousand, one hundred eighty-one".