201320322517 has 2 divisors, whose sum is σ = 201320322518. Its totient is φ = 201320322516.

The previous prime is 201320322473. The next prime is 201320322601. The reversal of 201320322517 is 715223023102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180055100241 + 21265222276 = 424329^2 + 145826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201320322517 is a prime.

It is a super-3 number, since 3×201320322517³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201320323517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660161258 + 100660161259.

It is an arithmetic number, because the mean of its divisors is an integer number (100660161259).

Almost surely, 2^201320322517 is an apocalyptic number.

It is an amenable number.

201320322517 is a deficient number, since it is larger than the sum of its proper divisors (1).

201320322517 is an equidigital number, since it uses as much as digits as its factorization.

201320322517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 201320322517 its reverse (715223023102), we get a palindrome (916543345619).

The spelling of 201320322517 in words is "two hundred one billion, three hundred twenty million, three hundred twenty-two thousand, five hundred seventeen".