11531103 has 4 divisors (see below), whose sum is σ = 15374808. Its totient is φ = 7687400.

The previous prime is 11531099. The next prime is 11531111. The reversal of 11531103 is 30113511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11531103 - 2² = 11531099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531123) 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, 1921848 + ... + 1921853.

It is an arithmetic number, because the mean of its divisors is an integer number (3843702).

Almost surely, 2^11531103 is an apocalyptic number.

11531103 is a deficient number, since it is larger than the sum of its proper divisors (3843705).

11531103 is an equidigital number, since it uses as much as digits as its factorization.

11531103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843704.

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 11531103 is about 3395.7477821534. The cubic root of 11531103 is about 225.9211814323.

Adding to 11531103 its reverse (30113511), we get a palindrome (41644614).

The spelling of 11531103 in words is "eleven million, five hundred thirty-one thousand, one hundred three".