11331487 has 4 divisors (see below), whose sum is σ = 11342016. Its totient is φ = 11320960.

The previous prime is 11331473. The next prime is 11331491. The reversal of 11331487 is 78413311.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331587) 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, 3439 + ... + 5872.

It is an arithmetic number, because the mean of its divisors is an integer number (2835504).

Almost surely, 2^11331487 is an apocalyptic number.

11331487 is a deficient number, since it is larger than the sum of its proper divisors (10529).

11331487 is an equidigital number, since it uses as much as digits as its factorization.

11331487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10528.

The product of its digits is 2016, while the sum is 28.

The square root of 11331487 is about 3366.2274135893. The cubic root of 11331487 is about 224.6099381682.

Adding to 11331487 its reverse (78413311), we get a palindrome (89744798).

The spelling of 11331487 in words is "eleven million, three hundred thirty-one thousand, four hundred eighty-seven".