11138533 has 12 divisors (see below), whose sum is σ = 13204620. Its totient is φ = 9364992.

The previous prime is 11138527. The next prime is 11138563. The reversal of 11138533 is 33583111.

It can be written as a sum of positive squares in 2 ways, for example, as 9443329 + 1695204 = 3073^2 + 1302^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11138533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11138498 and 11138507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11138513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453 + ... + 4741.

It is an arithmetic number, because the mean of its divisors is an integer number (1100385).

Almost surely, 2^11138533 is an apocalyptic number.

It is an amenable number.

11138533 is a deficient number, since it is larger than the sum of its proper divisors (2066087).

11138533 is an equidigital number, since it uses as much as digits as its factorization.

11138533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356 (or 4349 counting only the distinct ones).

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

The square root of 11138533 is about 3337.4440819286. Note that the first 3 decimals coincide. The cubic root of 11138533 is about 223.3277370445.

The spelling of 11138533 in words is "eleven million, one hundred thirty-eight thousand, five hundred thirty-three".