201564130217 has 2 divisors, whose sum is σ = 201564130218. Its totient is φ = 201564130216.

The previous prime is 201564130213. The next prime is 201564130253. The reversal of 201564130217 is 712031465102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199322959936 + 2241170281 = 446456^2 + 47341^2 .

It is a cyclic number.

It is not a de Polignac number, because 201564130217 - 2² = 201564130213 is a prime.

It is not a weakly prime, because it can be changed into another prime (201564130213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100782065108 + 100782065109.

It is an arithmetic number, because the mean of its divisors is an integer number (100782065109).

Almost surely, 2^201564130217 is an apocalyptic number.

It is an amenable number.

201564130217 is a deficient number, since it is larger than the sum of its proper divisors (1).

201564130217 is an equidigital number, since it uses as much as digits as its factorization.

201564130217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 201564130217 its reverse (712031465102), we get a palindrome (913595595319).

The spelling of 201564130217 in words is "two hundred one billion, five hundred sixty-four million, one hundred thirty thousand, two hundred seventeen".