11215916 has 24 divisors (see below), whose sum is σ = 20069616. Its totient is φ = 5483520.

The previous prime is 11215907. The next prime is 11215931. The reversal of 11215916 is 61951211.

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, 53051 + ... + 53261.

It is an arithmetic number, because the mean of its divisors is an integer number (836234).

Almost surely, 2^11215916 is an apocalyptic number.

It is an amenable number.

11215916 is a deficient number, since it is larger than the sum of its proper divisors (8853700).

11215916 is a wasteful number, since it uses less digits than its factorization.

11215916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its digits is 540, while the sum is 26.

The square root of 11215916 is about 3349.0171692603. The cubic root of 11215916 is about 223.8437207125.

The spelling of 11215916 in words is "eleven million, two hundred fifteen thousand, nine hundred sixteen".