11321566 has 8 divisors (see below), whose sum is σ = 17720784. Its totient is φ = 5414640.

The previous prime is 11321561. The next prime is 11321579. The reversal of 11321566 is 66512311.

11321566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 11321566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321561) 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, 123015 + ... + 123106.

It is an arithmetic number, because the mean of its divisors is an integer number (2215098).

Almost surely, 2^11321566 is an apocalyptic number.

11321566 is a deficient number, since it is larger than the sum of its proper divisors (6399218).

11321566 is a wasteful number, since it uses less digits than its factorization.

11321566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246146.

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

The square root of 11321566 is about 3364.7534827978. The cubic root of 11321566 is about 224.5443684908.

Adding to 11321566 its reverse (66512311), we get a palindrome (77833877).

The spelling of 11321566 in words is "eleven million, three hundred twenty-one thousand, five hundred sixty-six".