22144171 has 4 divisors (see below), whose sum is σ = 25307632. Its totient is φ = 18980712.

The previous prime is 22144169. The next prime is 22144181. The reversal of 22144171 is 17144122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22144171 - 2¹ = 22144169 is a prime.

It is a super-3 number, since 3×22144171³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22144181) 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 3 ways as a sum of consecutive naturals, for example, 1581720 + ... + 1581733.

It is an arithmetic number, because the mean of its divisors is an integer number (6326908).

Almost surely, 2^22144171 is an apocalyptic number.

22144171 is a deficient number, since it is larger than the sum of its proper divisors (3163461).

22144171 is an equidigital number, since it uses as much as digits as its factorization.

22144171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163460.

The product of its digits is 448, while the sum is 22.

The square root of 22144171 is about 4705.7593436129. The cubic root of 22144171 is about 280.8146808976.

Adding to 22144171 its reverse (17144122), we get a palindrome (39288293).

The spelling of 22144171 in words is "twenty-two million, one hundred forty-four thousand, one hundred seventy-one".