11811115 has 8 divisors (see below), whose sum is σ = 14194368. Its totient is φ = 9434880.

The previous prime is 11811109. The next prime is 11811187. The reversal of 11811115 is 51111811.

11811115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11811115 - 2⁵ = 11811083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11811092 and 11811101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3259 + ... + 5851.

It is an arithmetic number, because the mean of its divisors is an integer number (1774296).

Almost surely, 2^11811115 is an apocalyptic number.

11811115 is a deficient number, since it is larger than the sum of its proper divisors (2383253).

11811115 is an equidigital number, since it uses as much as digits as its factorization.

11811115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509.

The product of its digits is 40, while the sum is 19.

The square root of 11811115 is about 3436.7302774585. The cubic root of 11811115 is about 227.7352716418.

Adding to 11811115 its reverse (51111811), we get a palindrome (62922926).

The spelling of 11811115 in words is "eleven million, eight hundred eleven thousand, one hundred fifteen".