11218393 has 4 divisors (see below), whose sum is σ = 11252020. Its totient is φ = 11184768.

The previous prime is 11218381. The next prime is 11218397. The reversal of 11218393 is 39381211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1408969 + 9809424 = 1187^2 + 3132^2 .

It is a cyclic number.

It is not a de Polignac number, because 11218393 - 2⁹ = 11217881 is a prime.

It is a super-3 number, since 3×11218393³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11218397) 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, 16308 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (2813005).

Almost surely, 2^11218393 is an apocalyptic number.

It is an amenable number.

11218393 is a deficient number, since it is larger than the sum of its proper divisors (33627).

11218393 is an equidigital number, since it uses as much as digits as its factorization.

11218393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33626.

The product of its digits is 1296, while the sum is 28.

The square root of 11218393 is about 3349.3869588329. The cubic root of 11218393 is about 223.8601978950.

It can be divided in two parts, 11218 and 393, that added together give a palindrome (11611).

The spelling of 11218393 in words is "eleven million, two hundred eighteen thousand, three hundred ninety-three".