11215216 has 20 divisors (see below), whose sum is σ = 22087624. Its totient is φ = 5515200.

The previous prime is 11215213. The next prime is 11215229. The reversal of 11215216 is 61251211.

It is a junction number, because it is equal to n+sod(n) for n = 11215193 and 11215202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215213) 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, 4770 + ... + 6721.

Almost surely, 2^11215216 is an apocalyptic number.

11215216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11215216 is a deficient number, since it is larger than the sum of its proper divisors (10872408).

11215216 is a wasteful number, since it uses less digits than its factorization.

11215216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11560 (or 11554 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 11215216 is about 3348.9126593568. The cubic root of 11215216 is about 223.8390638224.

Adding to 11215216 its reverse (61251211), we get a palindrome (72466427).

The spelling of 11215216 in words is "eleven million, two hundred fifteen thousand, two hundred sixteen".