11215616 has 36 divisors (see below), whose sum is σ = 22602552. Its totient is φ = 5554176.

The previous prime is 11215601. The next prime is 11215619. The reversal of 11215616 is 61651211.

It is a junction number, because it is equal to n+sod(n) for n = 11215591 and 11215600.

It is not an unprimeable number, because it can be changed into a prime (11215619) 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, 49295 + ... + 49521.

Almost surely, 2^11215616 is an apocalyptic number.

11215616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11215616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11301276).

11215616 is an abundant number, since it is smaller than the sum of its proper divisors (11386936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11215616 is an equidigital number, since it uses as much as digits as its factorization.

11215616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 422 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 11215616 is about 3348.9723797010. The cubic root of 11215616 is about 223.8417249262.

Adding to 11215616 its reverse (61651211), we get a palindrome (72866827).

The spelling of 11215616 in words is "eleven million, two hundred fifteen thousand, six hundred sixteen".