22161171 has 8 divisors (see below), whose sum is σ = 29835520. Its totient is φ = 14630472.

The previous prime is 22161131. The next prime is 22161179. The reversal of 22161171 is 17116122.

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 22161171 - 2⁷ = 22161043 is a prime.

It is a super-2 number, since 2×22161171² = 982235000182482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22161179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35551 + ... + 36168.

It is an arithmetic number, because the mean of its divisors is an integer number (3729440).

Almost surely, 2^22161171 is an apocalyptic number.

22161171 is a deficient number, since it is larger than the sum of its proper divisors (7674349).

22161171 is a wasteful number, since it uses less digits than its factorization.

22161171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71825.

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

The square root of 22161171 is about 4707.5652942896. The cubic root of 22161171 is about 280.8865226549.

Adding to 22161171 its reverse (17116122), we get a palindrome (39277293).

The spelling of 22161171 in words is "twenty-two million, one hundred sixty-one thousand, one hundred seventy-one".