11003231 has 4 divisors (see below), whose sum is σ = 11014392. Its totient is φ = 10992072.

The previous prime is 11003197. The next prime is 11003249. The reversal of 11003231 is 13230011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13230011 = 829 ⋅15959.

It is a cyclic number.

It is not a de Polignac number, because 11003231 - 2¹⁰ = 11002207 is a prime.

It is a super-2 number, since 2×11003231² = 242142184878722, 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 (11003431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3941 + ... + 6126.

It is an arithmetic number, because the mean of its divisors is an integer number (2753598).

Almost surely, 2^11003231 is an apocalyptic number.

11003231 is a deficient number, since it is larger than the sum of its proper divisors (11161).

11003231 is a wasteful number, since it uses less digits than its factorization.

11003231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11160.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 11003231 is about 3317.1118461698. Note that the first 3 decimals coincide. The cubic root of 11003231 is about 222.4197817122.

Adding to 11003231 its reverse (13230011), we get a palindrome (24233242).

The spelling of 11003231 in words is "eleven million, three thousand, two hundred thirty-one".