22117161 has 8 divisors (see below), whose sum is σ = 32170464. Its totient is φ = 13404320.

The previous prime is 22117103. The next prime is 22117171. The reversal of 22117161 is 16171122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22117161 - 2⁶ = 22117097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22117171) 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 7 ways as a sum of consecutive naturals, for example, 335076 + ... + 335141.

It is an arithmetic number, because the mean of its divisors is an integer number (4021308).

Almost surely, 2^22117161 is an apocalyptic number.

It is an amenable number.

22117161 is a deficient number, since it is larger than the sum of its proper divisors (10053303).

22117161 is a wasteful number, since it uses less digits than its factorization.

22117161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670231.

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

The square root of 22117161 is about 4702.8885804365. Note that the first 3 decimals coincide. The cubic root of 22117161 is about 280.7004613672.

Adding to 22117161 its reverse (16171122), we get a palindrome (38288283).

The spelling of 22117161 in words is "twenty-two million, one hundred seventeen thousand, one hundred sixty-one".