22170320 has 40 divisors (see below), whose sum is σ = 52095624. Its totient is φ = 8773632.

The previous prime is 22170221. The next prime is 22170331. The reversal of 22170320 is 2307122.

It can be written as a sum of positive squares in 4 ways, for example, as 3125824 + 19044496 = 1768^2 + 4364^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6332 + ... + 9188.

Almost surely, 2^22170320 is an apocalyptic number.

22170320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22170320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26047812).

22170320 is an abundant number, since it is smaller than the sum of its proper divisors (29925304).

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

22170320 is a wasteful number, since it uses less digits than its factorization.

22170320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967 (or 2961 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 22170320 is about 4708.5369277515. The cubic root of 22170320 is about 280.9251709922.

Adding to 22170320 its reverse (2307122), we get a palindrome (24477442).

The spelling of 22170320 in words is "twenty-two million, one hundred seventy thousand, three hundred twenty".