11172231 has 12 divisors (see below), whose sum is σ = 18443152. Its totient is φ = 6384096.

The previous prime is 11172199. The next prime is 11172233. The reversal of 11172231 is 13227111.

It is a happy number.

It is not a de Polignac number, because 11172231 - 2⁵ = 11172199 is a prime.

It is a super-2 number, since 2×11172231² = 249637491034722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88606 + ... + 88731.

Almost surely, 2^11172231 is an apocalyptic number.

11172231 is a deficient number, since it is larger than the sum of its proper divisors (7270921).

11172231 is a wasteful number, since it uses less digits than its factorization.

11172231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177350 (or 177347 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 11172231 is about 3342.4887434365. The cubic root of 11172231 is about 223.5527254253.

Adding to 11172231 its reverse (13227111), we get a palindrome (24399342).

The spelling of 11172231 in words is "eleven million, one hundred seventy-two thousand, two hundred thirty-one".