11531343 has 4 divisors (see below), whose sum is σ = 15375128. Its totient is φ = 7687560.

The previous prime is 11531339. The next prime is 11531363. The reversal of 11531343 is 34313511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34313511 = 3 ⋅11437837.

It is not a de Polignac number, because 11531343 - 2² = 11531339 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921888 + ... + 1921893.

It is an arithmetic number, because the mean of its divisors is an integer number (3843782).

Almost surely, 2^11531343 is an apocalyptic number.

11531343 is a deficient number, since it is larger than the sum of its proper divisors (3843785).

11531343 is an equidigital number, since it uses as much as digits as its factorization.

11531343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843784.

The product of its digits is 540, while the sum is 21.

The square root of 11531343 is about 3395.7831202832. The cubic root of 11531343 is about 225.9227488078.

Adding to 11531343 its reverse (34313511), we get a palindrome (45844854).

The spelling of 11531343 in words is "eleven million, five hundred thirty-one thousand, three hundred forty-three".