201031330397 has 2 divisors, whose sum is σ = 201031330398. Its totient is φ = 201031330396.

The previous prime is 201031330387. The next prime is 201031330411. The reversal of 201031330397 is 793033130102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193820943001 + 7210387396 = 440251^2 + 84914^2 .

It is a cyclic number.

It is not a de Polignac number, because 201031330397 - 2³⁰ = 199957588573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201031330387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100515665198 + 100515665199.

It is an arithmetic number, because the mean of its divisors is an integer number (100515665199).

Almost surely, 2^201031330397 is an apocalyptic number.

It is an amenable number.

201031330397 is a deficient number, since it is larger than the sum of its proper divisors (1).

201031330397 is an equidigital number, since it uses as much as digits as its factorization.

201031330397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 32.

Adding to 201031330397 its reverse (793033130102), we get a palindrome (994064460499).

The spelling of 201031330397 in words is "two hundred one billion, thirty-one million, three hundred thirty thousand, three hundred ninety-seven".