22171116 has 48 divisors (see below), whose sum is σ = 57028608. Its totient is φ = 6648000.

The previous prime is 22171091. The next prime is 22171117. The reversal of 22171116 is 61117122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22171092 and 22171101.

It is not an unprimeable number, because it can be changed into a prime (22171117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12501 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (1188096).

Almost surely, 2^22171116 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 22171116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28514304).

22171116 is an abundant number, since it is smaller than the sum of its proper divisors (34857492).

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

22171116 is a wasteful number, since it uses less digits than its factorization.

22171116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1780 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 22171116 is about 4708.6214543112. The cubic root of 22171116 is about 280.9285330510.

Adding to 22171116 its reverse (61117122), we get a palindrome (83288238).

It can be divided in two parts, 2217 and 1116, that added together give a palindrome (3333).

The spelling of 22171116 in words is "twenty-two million, one hundred seventy-one thousand, one hundred sixteen".