210064172209 has 2 divisors, whose sum is σ = 210064172210. Its totient is φ = 210064172208.

The previous prime is 210064172179. The next prime is 210064172291. The reversal of 210064172209 is 902271460012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203671690000 + 6392482209 = 451300^2 + 79953^2 .

It is a cyclic number.

It is not a de Polignac number, because 210064172209 - 2⁵ = 210064172177 is a prime.

It is not a weakly prime, because it can be changed into another prime (210064172299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105032086104 + 105032086105.

It is an arithmetic number, because the mean of its divisors is an integer number (105032086105).

Almost surely, 2^210064172209 is an apocalyptic number.

It is an amenable number.

210064172209 is a deficient number, since it is larger than the sum of its proper divisors (1).

210064172209 is an equidigital number, since it uses as much as digits as its factorization.

210064172209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 210064172209 in words is "two hundred ten billion, sixty-four million, one hundred seventy-two thousand, two hundred nine".