22172271 has 8 divisors (see below), whose sum is σ = 32250624. Its totient is φ = 13437720.

The previous prime is 22172261. The next prime is 22172273. The reversal of 22172271 is 17227122.

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

It is not a de Polignac number, because 22172271 - 2²³ = 13783663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22172273) 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, 335911 + ... + 335976.

It is an arithmetic number, because the mean of its divisors is an integer number (4031328).

Almost surely, 2^22172271 is an apocalyptic number.

22172271 is a deficient number, since it is larger than the sum of its proper divisors (10078353).

22172271 is a wasteful number, since it uses less digits than its factorization.

22172271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671901.

The product of its digits is 784, while the sum is 24.

The square root of 22172271 is about 4708.7441000759. The cubic root of 22172271 is about 280.9334112722.

Adding to 22172271 its reverse (17227122), we get a palindrome (39399393).

The spelling of 22172271 in words is "twenty-two million, one hundred seventy-two thousand, two hundred seventy-one".