22159872 has 160 divisors (see below), whose sum is σ = 75292800. Its totient is φ = 6303744.

The previous prime is 22159867. The next prime is 22159873. The reversal of 22159872 is 27895122.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22159873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96654 + ... + 96882.

It is an arithmetic number, because the mean of its divisors is an integer number (470580).

Almost surely, 2^22159872 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 22159872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37646400).

22159872 is an abundant number, since it is smaller than the sum of its proper divisors (53132928).

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

22159872 is an equidigital number, since it uses as much as digits as its factorization.

22159872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 241 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 22159872 is about 4707.4273228591. The cubic root of 22159872 is about 280.8810343961.

The spelling of 22159872 in words is "twenty-two million, one hundred fifty-nine thousand, eight hundred seventy-two".