22209001 has 2 divisors, whose sum is σ = 22209002. Its totient is φ = 22209000.

The previous prime is 22208981. The next prime is 22209017. The reversal of 22209001 is 10090222.

It is a happy number.

It is an a-pointer prime, because the next prime (22209017) can be obtained adding 22209001 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13682601 + 8526400 = 3699^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 22209001 - 2⁵ = 22208969 is a prime.

It is not a weakly prime, because it can be changed into another prime (22209071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11104500 + 11104501.

It is an arithmetic number, because the mean of its divisors is an integer number (11104501).

Almost surely, 2^22209001 is an apocalyptic number.

It is an amenable number.

22209001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22209001 is an equidigital number, since it uses as much as digits as its factorization.

22209001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22209001 is about 4712.6426768852. The cubic root of 22209001 is about 281.0884546527.

Adding to 22209001 its reverse (10090222), we get a palindrome (32299223).

The spelling of 22209001 in words is "twenty-two million, two hundred nine thousand, one".