22116645 has 48 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 11617344.

The previous prime is 22116641. The next prime is 22116683. The reversal of 22116645 is 54661122.

22116645 is a `hidden beast` number, since 2 + 2 + 1 + 16 + 645 = 666.

It is not a de Polignac number, because 22116645 - 2² = 22116641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22116641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132352 + ... + 132518.

It is an arithmetic number, because the mean of its divisors is an integer number (840840).

Almost surely, 2^22116645 is an apocalyptic number.

It is an amenable number.

22116645 is a deficient number, since it is larger than the sum of its proper divisors (18243675).

22116645 is a wasteful number, since it uses less digits than its factorization.

22116645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 284 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22116645 is about 4702.8337202159. The cubic root of 22116645 is about 280.6982784083.

Adding to 22116645 its reverse (54661122), we get a palindrome (76777767).

The spelling of 22116645 in words is "twenty-two million, one hundred sixteen thousand, six hundred forty-five".