11216891 has 8 divisors (see below), whose sum is σ = 12843744. Its totient is φ = 9596160.

The previous prime is 11216861. The next prime is 11216911. The reversal of 11216891 is 19861211.

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

It is a de Polignac number, because none of the positive numbers 2^k-11216891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11216861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3521 + ... + 5901.

It is an arithmetic number, because the mean of its divisors is an integer number (1605468).

Almost surely, 2^11216891 is an apocalyptic number.

11216891 is a deficient number, since it is larger than the sum of its proper divisors (1626853).

11216891 is an equidigital number, since it uses as much as digits as its factorization.

11216891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061.

The product of its digits is 864, while the sum is 29.

The square root of 11216891 is about 3349.1627311912. The cubic root of 11216891 is about 223.8502067723.

The spelling of 11216891 in words is "eleven million, two hundred sixteen thousand, eight hundred ninety-one".