201361 has 4 divisors (see below), whose sum is σ = 204724. Its totient is φ = 198000.

The previous prime is 201359. The next prime is 201389. The reversal of 201361 is 163102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163102 = 2 ⋅81551.

It can be written as a sum of positive squares in 2 ways, for example, as 20736 + 180625 = 144^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 201361 - 2¹ = 201359 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (201661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1590 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (51181).

2²⁰¹³⁶¹ is an apocalyptic number.

It is an amenable number.

201361 is a deficient number, since it is larger than the sum of its proper divisors (3363).

201361 is an equidigital number, since it uses as much as digits as its factorization.

201361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 201361 is about 448.7326598321. The cubic root of 201361 is about 58.6127079337.

Adding to 201361 its reverse (163102), we get a palindrome (364463).

The spelling of 201361 in words is "two hundred one thousand, three hundred sixty-one".