22005001 has 4 divisors (see below), whose sum is σ = 22052992. Its totient is φ = 21957012.

The previous prime is 22004989. The next prime is 22005013. The reversal of 22005001 is 10050022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (22004989) and next prime (22005013).

It is a cyclic number.

It is not a de Polignac number, because 22005001 - 2¹⁹ = 21480713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22005031) 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, 23301 + ... + 24226.

It is an arithmetic number, because the mean of its divisors is an integer number (5513248).

Almost surely, 2^22005001 is an apocalyptic number.

It is an amenable number.

22005001 is a deficient number, since it is larger than the sum of its proper divisors (47991).

22005001 is an equidigital number, since it uses as much as digits as its factorization.

22005001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47990.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 22005001 is about 4690.9488379218. The cubic root of 22005001 is about 280.2251632732.

Adding to 22005001 its reverse (10050022), we get a palindrome (32055023).

It can be divided in two parts, 2 and 2005001, that added together give a triangular number (2005003 = T₂₀₀₂).

The spelling of 22005001 in words is "twenty-two million, five thousand, one".