11531383 has 4 divisors (see below), whose sum is σ = 11843080. Its totient is φ = 11219688.

The previous prime is 11531371. The next prime is 11531407. The reversal of 11531383 is 38313511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38313511 = 1361 ⋅28151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11531383 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 (11531363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155793 + ... + 155866.

It is an arithmetic number, because the mean of its divisors is an integer number (2960770).

Almost surely, 2^11531383 is an apocalyptic number.

11531383 is a deficient number, since it is larger than the sum of its proper divisors (311697).

11531383 is an equidigital number, since it uses as much as digits as its factorization.

11531383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311696.

The product of its digits is 1080, while the sum is 25.

The square root of 11531383 is about 3395.7890099357. The cubic root of 11531383 is about 225.9230100350.

Adding to 11531383 its reverse (38313511), we get a palindrome (49844894).

The spelling of 11531383 in words is "eleven million, five hundred thirty-one thousand, three hundred eighty-three".