22172849 has 8 divisors (see below), whose sum is σ = 23328000. Its totient is φ = 21043792.

The previous prime is 22172827. The next prime is 22172893. The reversal of 22172849 is 94827122.

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

It is not a de Polignac number, because 22172849 - 2²⁰ = 21124273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22172819) 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, 4769 + ... + 8190.

It is an arithmetic number, because the mean of its divisors is an integer number (2916000).

Almost surely, 2^22172849 is an apocalyptic number.

22172849 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22172849 is a deficient number, since it is larger than the sum of its proper divisors (1155151).

22172849 is a wasteful number, since it uses less digits than its factorization.

22172849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13047.

The product of its digits is 16128, while the sum is 35.

The square root of 22172849 is about 4708.8054748524. The cubic root of 22172849 is about 280.9358524309.

The spelling of 22172849 in words is "twenty-two million, one hundred seventy-two thousand, eight hundred forty-nine".