201331271 has 2 divisors, whose sum is σ = 201331272. Its totient is φ = 201331270.

The previous prime is 201331241. The next prime is 201331321. The reversal of 201331271 is 172133102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201331271 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201331241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665635 + 100665636.

It is an arithmetic number, because the mean of its divisors is an integer number (100665636).

Almost surely, 2^201331271 is an apocalyptic number.

201331271 is a deficient number, since it is larger than the sum of its proper divisors (1).

201331271 is an equidigital number, since it uses as much as digits as its factorization.

201331271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 201331271 is about 14189.1250963546. The cubic root of 201331271 is about 586.0982325896.

Adding to 201331271 its reverse (172133102), we get a palindrome (373464373).

The spelling of 201331271 in words is "two hundred one million, three hundred thirty-one thousand, two hundred seventy-one".