22116447 has 6 divisors (see below), whose sum is σ = 31945992. Its totient is φ = 14744292.

The previous prime is 22116443. The next prime is 22116481. The reversal of 22116447 is 74461122.

22116447 is a `hidden beast` number, since 2 + 2 + 11 + 644 + 7 = 666.

It is not a de Polignac number, because 22116447 - 2² = 22116443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22116447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22116443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228683 + ... + 1228700.

It is an arithmetic number, because the mean of its divisors is an integer number (5324332).

Almost surely, 2^22116447 is an apocalyptic number.

22116447 is a deficient number, since it is larger than the sum of its proper divisors (9829545).

22116447 is a wasteful number, since it uses less digits than its factorization.

22116447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457389 (or 2457386 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 22116447 is about 4702.8126690312. The cubic root of 22116447 is about 280.6974407522.

Adding to 22116447 its reverse (74461122), we get a palindrome (96577569).

The spelling of 22116447 in words is "twenty-two million, one hundred sixteen thousand, four hundred forty-seven".