11153231 has 4 divisors (see below), whose sum is σ = 11160072. Its totient is φ = 11146392.

The previous prime is 11153227. The next prime is 11153237. The reversal of 11153231 is 13235111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13235111 = 163 ⋅81197.

It is a cyclic number.

It is not a de Polignac number, because 11153231 - 2² = 11153227 is a prime.

It is a super-2 number, since 2×11153231² = 248789123478722, 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 (11153237) 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, 605 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (2790018).

Almost surely, 2^11153231 is an apocalyptic number.

11153231 is a deficient number, since it is larger than the sum of its proper divisors (6841).

11153231 is an equidigital number, since it uses as much as digits as its factorization.

11153231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840.

The product of its digits is 90, while the sum is 17.

The square root of 11153231 is about 3339.6453404516. The cubic root of 11153231 is about 223.4259255680.

Adding to 11153231 its reverse (13235111), we get a palindrome (24388342).

The spelling of 11153231 in words is "eleven million, one hundred fifty-three thousand, two hundred thirty-one".