201305281 has 2 divisors, whose sum is σ = 201305282. Its totient is φ = 201305280.

The previous prime is 201305261. The next prime is 201305329. The reversal of 201305281 is 182503102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194853681 + 6451600 = 13959^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 201305281 - 2⁵ = 201305249 is a prime.

It is a super-2 number, since 2×201305281² = 81047632316977922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201305201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100652640 + 100652641.

It is an arithmetic number, because the mean of its divisors is an integer number (100652641).

Almost surely, 2^201305281 is an apocalyptic number.

It is an amenable number.

201305281 is a deficient number, since it is larger than the sum of its proper divisors (1).

201305281 is an equidigital number, since it uses as much as digits as its factorization.

201305281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 201305281 is about 14188.2092245639. The cubic root of 201305281 is about 586.0730115554.

Adding to 201305281 its reverse (182503102), we get a palindrome (383808383).

The spelling of 201305281 in words is "two hundred one million, three hundred five thousand, two hundred eighty-one".