11343581 has 2 divisors, whose sum is σ = 11343582. Its totient is φ = 11343580.

The previous prime is 11343557. The next prime is 11343583. The reversal of 11343581 is 18534311.

11343581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10621081 + 722500 = 3259^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 11343581 - 2²² = 7149277 is a prime.

It is a super-2 number, since 2×11343581² = 257353659807122, which contains 22 as substring.

Together with 11343583, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11343581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11343583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5671790 + 5671791.

It is an arithmetic number, because the mean of its divisors is an integer number (5671791).

Almost surely, 2^11343581 is an apocalyptic number.

It is an amenable number.

11343581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11343581 is an equidigital number, since it uses as much as digits as its factorization.

11343581 is an evil number, because the sum of its binary digits is even.

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

The square root of 11343581 is about 3368.0233075203. The cubic root of 11343581 is about 224.6898178508.

Adding to 11343581 its reverse (18534311), we get a palindrome (29877892).

The spelling of 11343581 in words is "eleven million, three hundred forty-three thousand, five hundred eighty-one".