22640001 has 16 divisors (see below), whose sum is σ = 32216640. Its totient is φ = 14100480.

The previous prime is 22639987. The next prime is 22640053. The reversal of 22640001 is 10004622.

It is not a de Polignac number, because 22640001 - 2⁷ = 22639873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22640201) 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, 1441 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (2013540).

Almost surely, 2^22640001 is an apocalyptic number.

It is an amenable number.

22640001 is a deficient number, since it is larger than the sum of its proper divisors (9576639).

22640001 is a wasteful number, since it uses less digits than its factorization.

22640001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22640001 is about 4758.1510064310. The cubic root of 22640001 is about 282.8951360993.

Adding to 22640001 its reverse (10004622), we get a palindrome (32644623).

The spelling of 22640001 in words is "twenty-two million, six hundred forty thousand, one".