220009001 has 2 divisors, whose sum is σ = 220009002. Its totient is φ = 220009000.

The previous prime is 220008977. The next prime is 220009033. The reversal of 220009001 is 100900022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 101525776 = 10885^2 + 10076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220009001 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (220005001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110004500 + 110004501.

It is an arithmetic number, because the mean of its divisors is an integer number (110004501).

Almost surely, 2^220009001 is an apocalyptic number.

It is an amenable number.

220009001 is a deficient number, since it is larger than the sum of its proper divisors (1).

220009001 is an equidigital number, since it uses as much as digits as its factorization.

220009001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 220009001 is about 14832.7003947359. The cubic root of 220009001 is about 603.6893064968.

Adding to 220009001 its reverse (100900022), we get a palindrome (320909023).

The spelling of 220009001 in words is "two hundred twenty million, nine thousand, one".