22171201 has 8 divisors (see below), whose sum is σ = 24459624. Its totient is φ = 19966080.

The previous prime is 22171199. The next prime is 22171211. The reversal of 22171201 is 10217122.

It can be written as a sum of positive squares in 4 ways, for example, as 641601 + 21529600 = 801^2 + 4640^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22171201 - 2¹ = 22171199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22171211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20266 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (3057453).

Almost surely, 2^22171201 is an apocalyptic number.

It is an amenable number.

22171201 is a deficient number, since it is larger than the sum of its proper divisors (2288423).

22171201 is a wasteful number, since it uses less digits than its factorization.

22171201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41651.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 22171201 is about 4708.6304802989. The cubic root of 22171201 is about 280.9288920601.

Adding to 22171201 its reverse (10217122), we get a palindrome (32388323).

It can be divided in two parts, 2217120 and 1, that added together give a square (2217121 = 1489²).

The spelling of 22171201 in words is "twenty-two million, one hundred seventy-one thousand, two hundred one".