22005641 has 16 divisors (see below), whose sum is σ = 26517504. Its totient is φ = 17853264.

The previous prime is 22005617. The next prime is 22005647. The reversal of 22005641 is 14650022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22005641 - 2¹⁰ = 22004617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22005647) 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, 15920 + ... + 17246.

It is an arithmetic number, because the mean of its divisors is an integer number (1657344).

Almost surely, 2^22005641 is an apocalyptic number.

It is an amenable number.

22005641 is a deficient number, since it is larger than the sum of its proper divisors (4511863).

22005641 is a wasteful number, since it uses less digits than its factorization.

22005641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22005641 is about 4691.0170539021. The cubic root of 22005641 is about 280.2278799642.

Adding to 22005641 its reverse (14650022), we get a palindrome (36655663).

The spelling of 22005641 in words is "twenty-two million, five thousand, six hundred forty-one".