11581343 has 4 divisors (see below), whose sum is σ = 11597400. Its totient is φ = 11565288.

The previous prime is 11581337. The next prime is 11581357. The reversal of 11581343 is 34318511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11581343 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 (11581363) 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, 6893 + ... + 8406.

It is an arithmetic number, because the mean of its divisors is an integer number (2899350).

Almost surely, 2^11581343 is an apocalyptic number.

11581343 is a deficient number, since it is larger than the sum of its proper divisors (16057).

11581343 is an equidigital number, since it uses as much as digits as its factorization.

11581343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16056.

The product of its digits is 1440, while the sum is 26.

The square root of 11581343 is about 3403.1372290873. The cubic root of 11581343 is about 226.2488123011.

Adding to 11581343 its reverse (34318511), we get a palindrome (45899854).

The spelling of 11581343 in words is "eleven million, five hundred eighty-one thousand, three hundred forty-three".