11533221 has 12 divisors (see below), whose sum is σ = 19039072. Its totient is φ = 6590376.

The previous prime is 11533217. The next prime is 11533241. The reversal of 11533221 is 12233511.

11533221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11533221 - 2² = 11533217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11533194 and 11533203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533211) 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 11 ways as a sum of consecutive naturals, for example, 91471 + ... + 91596.

Almost surely, 2^11533221 is an apocalyptic number.

It is an amenable number.

11533221 is a deficient number, since it is larger than the sum of its proper divisors (7505851).

11533221 is a wasteful number, since it uses less digits than its factorization.

11533221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183080 (or 183077 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 11533221 is about 3396.0596284518. The cubic root of 11533221 is about 225.9350127708.

Adding to 11533221 its reverse (12233511), we get a palindrome (23766732).

The spelling of 11533221 in words is "eleven million, five hundred thirty-three thousand, two hundred twenty-one".