11381333 has 4 divisors (see below), whose sum is σ = 11388300. Its totient is φ = 11374368.

The previous prime is 11381329. The next prime is 11381353. The reversal of 11381333 is 33318311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33318311 = 13 ⋅2562947.

It can be written as a sum of positive squares in 2 ways, for example, as 5654884 + 5726449 = 2378^2 + 2393^2 .

It is a cyclic number.

It is not a de Polignac number, because 11381333 - 2² = 11381329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11381299 and 11381308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443 + ... + 4791.

It is an arithmetic number, because the mean of its divisors is an integer number (2847075).

Almost surely, 2^11381333 is an apocalyptic number.

It is an amenable number.

11381333 is a deficient number, since it is larger than the sum of its proper divisors (6967).

11381333 is an equidigital number, since it uses as much as digits as its factorization.

11381333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6966.

The product of its digits is 648, while the sum is 23.

The square root of 11381333 is about 3373.6231265510. The cubic root of 11381333 is about 224.9388014629.

Adding to 11381333 its reverse (33318311), we get a palindrome (44699644).

It can be divided in two parts, 11381 and 333, that multiplied together give a palindrome (3789873).

The spelling of 11381333 in words is "eleven million, three hundred eighty-one thousand, three hundred thirty-three".