22159172 has 48 divisors (see below), whose sum is σ = 46771200. Its totient is φ = 9172800.

The previous prime is 22159157. The next prime is 22159201. The reversal of 22159172 is 27195122.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42272 + ... + 42792.

It is an arithmetic number, because the mean of its divisors is an integer number (974400).

Almost surely, 2^22159172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22159172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23385600).

22159172 is an abundant number, since it is smaller than the sum of its proper divisors (24612028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22159172 is a wasteful number, since it uses less digits than its factorization.

22159172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 561 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 22159172 is about 4707.3529716816. The cubic root of 22159172 is about 280.8780768160.

The spelling of 22159172 in words is "twenty-two million, one hundred fifty-nine thousand, one hundred seventy-two".