22111161 has 8 divisors (see below), whose sum is σ = 29591424. Its totient is φ = 14685840.

The previous prime is 22111157. The next prime is 22111181. The reversal of 22111161 is 16111122.

It is a happy number.

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

It is not a de Polignac number, because 22111161 - 2² = 22111157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22111161.

It is not an unprimeable number, because it can be changed into a prime (22111121) 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, 12786 + ... + 14411.

It is an arithmetic number, because the mean of its divisors is an integer number (3698928).

Almost surely, 2^22111161 is an apocalyptic number.

It is an amenable number.

22111161 is a deficient number, since it is larger than the sum of its proper divisors (7480263).

22111161 is a wasteful number, since it uses less digits than its factorization.

22111161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27471.

The product of its digits is 24, while the sum is 15.

The square root of 22111161 is about 4702.2506313467. The cubic root of 22111161 is about 280.6750760252.

Adding to 22111161 its reverse (16111122), we get a palindrome (38222283).

The spelling of 22111161 in words is "twenty-two million, one hundred eleven thousand, one hundred sixty-one".