22115616 has 48 divisors (see below), whose sum is σ = 58623264. Its totient is φ = 7299584.

The previous prime is 22115609. The next prime is 22115647. The reversal of 22115616 is 61651122.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 9196 + ... + 11348.

It is an arithmetic number, because the mean of its divisors is an integer number (1221318).

Almost surely, 2^22115616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22115616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29311632).

22115616 is an abundant number, since it is smaller than the sum of its proper divisors (36507648).

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

22115616 is a wasteful number, since it uses less digits than its factorization.

22115616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273 (or 2265 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 22115616 is about 4702.7243168189. The cubic root of 22115616 is about 280.6939250806.

Adding to 22115616 its reverse (61651122), we get a palindrome (83766738).

The spelling of 22115616 in words is "twenty-two million, one hundred fifteen thousand, six hundred sixteen".