11528181 has 18 divisors (see below), whose sum is σ = 19371222. Its totient is φ = 6587280.

The previous prime is 11528173. The next prime is 11528183. The reversal of 11528181 is 18182511.

11528181 is nontrivially palindromic in base 2.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 933156 = 3255^2 + 966^2 .

It is not a de Polignac number, because 11528181 - 2³ = 11528173 is a prime.

It is a super-2 number, since 2×11528181² = 265797914337522, which contains 22 as substring.

11528181 is a modest number, since divided by 8181 gives 1152 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11528183) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12630 + ... + 13511.

It is an arithmetic number, because the mean of its divisors is an integer number (1076179).

Almost surely, 2^11528181 is an apocalyptic number.

It is an amenable number.

11528181 is a deficient number, since it is larger than the sum of its proper divisors (7843041).

11528181 is a wasteful number, since it uses less digits than its factorization.

11528181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26161 (or 26151 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 11528181 is about 3395.3175109259. The cubic root of 11528181 is about 225.9020968902.

The spelling of 11528181 in words is "eleven million, five hundred twenty-eight thousand, one hundred eighty-one".