11813133 has 8 divisors (see below), whose sum is σ = 15890688. Its totient is φ = 7805504.

The previous prime is 11813129. The next prime is 11813143. The reversal of 11813133 is 33131811.

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

It is a cyclic number.

It is not a de Polignac number, because 11813133 - 2² = 11813129 is a prime.

It is a super-2 number, since 2×11813133² = 279100222551378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17085 + ... + 17762.

It is an arithmetic number, because the mean of its divisors is an integer number (1986336).

Almost surely, 2^11813133 is an apocalyptic number.

It is an amenable number.

11813133 is a deficient number, since it is larger than the sum of its proper divisors (4077555).

11813133 is a wasteful number, since it uses less digits than its factorization.

11813133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34963.

The product of its digits is 216, while the sum is 21.

The square root of 11813133 is about 3437.0238579329. The cubic root of 11813133 is about 227.7482408832.

Adding to 11813133 its reverse (33131811), we get a palindrome (44944944).

It can be divided in two parts, 1181 and 3133, that multiplied together give a palindrome (3700073).

The spelling of 11813133 in words is "eleven million, eight hundred thirteen thousand, one hundred thirty-three".