11229181 has 4 divisors (see below), whose sum is σ = 11255200. Its totient is φ = 11203164.

The previous prime is 11229173. The next prime is 11229187. The reversal of 11229181 is 18192211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18192211 = 2221 ⋅8191.

It is a cyclic number.

It is not a de Polignac number, because 11229181 - 2³ = 11229173 is a prime.

It is a super-2 number, since 2×11229181² = 252189011861522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11229187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12351 + ... + 13228.

It is an arithmetic number, because the mean of its divisors is an integer number (2813800).

Almost surely, 2^11229181 is an apocalyptic number.

It is an amenable number.

11229181 is a deficient number, since it is larger than the sum of its proper divisors (26019).

11229181 is an equidigital number, since it uses as much as digits as its factorization.

11229181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26018.

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

The square root of 11229181 is about 3350.9970158148. The cubic root of 11229181 is about 223.9319321773.

The spelling of 11229181 in words is "eleven million, two hundred twenty-nine thousand, one hundred eighty-one".