22008001 has 4 divisors (see below), whose sum is σ = 22226004. Its totient is φ = 21790000.

The previous prime is 22007989. The next prime is 22008037. The reversal of 22008001 is 10080022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10112400 + 11895601 = 3180^2 + 3449^2 .

It is a cyclic number.

It is not a de Polignac number, because 22008001 - 2²³ = 13619393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22008101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108850 + ... + 109051.

It is an arithmetic number, because the mean of its divisors is an integer number (5556501).

Almost surely, 2^22008001 is an apocalyptic number.

It is an amenable number.

22008001 is a deficient number, since it is larger than the sum of its proper divisors (218003).

22008001 is a wasteful number, since it uses less digits than its factorization.

22008001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218002.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 22008001 is about 4691.2685917564. The cubic root of 22008001 is about 280.2378973071.

Adding to 22008001 its reverse (10080022), we get a palindrome (32088023).

It can be divided in two parts, 2200 and 8001, that added together give a palindrome (10201).

The spelling of 22008001 in words is "twenty-two million, eight thousand, one".