11218705 has 4 divisors (see below), whose sum is σ = 13462452. Its totient is φ = 8974960.

The previous prime is 11218699. The next prime is 11218747. The reversal of 11218705 is 50781211.

11218705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50781211 = 13 ⋅3906247.

It can be written as a sum of positive squares in 2 ways, for example, as 1830609 + 9388096 = 1353^2 + 3064^2 .

It is not a de Polignac number, because 11218705 - 2⁷ = 11218577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11218705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121866 + ... + 1121875.

It is an arithmetic number, because the mean of its divisors is an integer number (3365613).

Almost surely, 2^11218705 is an apocalyptic number.

It is an amenable number.

11218705 is a deficient number, since it is larger than the sum of its proper divisors (2243747).

11218705 is an equidigital number, since it uses as much as digits as its factorization.

11218705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243746.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 11218705 is about 3349.4335341965. The cubic root of 11218705 is about 223.8622731695.

Adding to 11218705 its reverse (50781211), we get a palindrome (61999916).

The spelling of 11218705 in words is "eleven million, two hundred eighteen thousand, seven hundred five".