22168161 has 28 divisors (see below), whose sum is σ = 33996672. Its totient is φ = 14441976.

The previous prime is 22168147. The next prime is 22168169. The reversal of 22168161 is 16186122.

It is a de Polignac number, because none of the positive numbers 2^k-22168161 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (22168169) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 33940 + ... + 34586.

Almost surely, 2^22168161 is an apocalyptic number.

It is an amenable number.

22168161 is a deficient number, since it is larger than the sum of its proper divisors (11828511).

22168161 is an frugal number, since it uses more digits than its factorization.

22168161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 697 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 22168161 is about 4708.3076577471. The cubic root of 22168161 is about 280.9160516360.

The spelling of 22168161 in words is "twenty-two million, one hundred sixty-eight thousand, one hundred sixty-one".