11166181 has 8 divisors (see below), whose sum is σ = 12058200. Its totient is φ = 10278912.

The previous prime is 11166173. The next prime is 11166187. The reversal of 11166181 is 18166111.

11166181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2220100 + 8946081 = 1490^2 + 2991^2 .

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 11166181 - 2³ = 11166173 is a prime.

It is a super-2 number, since 2×11166181² = 249367196249522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11166187) 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, 4881 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (1507275).

Almost surely, 2^11166181 is an apocalyptic number.

It is an amenable number.

11166181 is a deficient number, since it is larger than the sum of its proper divisors (892019).

11166181 is a wasteful number, since it uses less digits than its factorization.

11166181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375.

The product of its digits is 288, while the sum is 25.

The square root of 11166181 is about 3341.5836066153. The cubic root of 11166181 is about 223.5123652920.

The spelling of 11166181 in words is "eleven million, one hundred sixty-six thousand, one hundred eighty-one".