16201 has 4 divisors (see below), whose sum is σ = 17172. Its totient is φ = 15232.

The previous prime is 16193. The next prime is 16217. The reversal of 16201 is 10261.

16201 = 3² + 4² + ... + 36².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10261 = 31 ⋅331.

It can be written as a sum of positive squares in 2 ways, for example, as 9801 + 6400 = 99^2 + 80^2 .

It is not a de Polignac number, because 16201 - 2³ = 16193 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (4293).

2¹⁶²⁰¹ is an apocalyptic number.

16201 is the 81-st centered pentagonal number.

It is an amenable number.

16201 is a deficient number, since it is larger than the sum of its proper divisors (971).

16201 is an equidigital number, since it uses as much as digits as its factorization.

16201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 16201 is about 127.2831489240. The cubic root of 16201 is about 25.3035005858.

Adding to 16201 its reverse (10261), we get a palindrome (26462).

The spelling of 16201 in words is "sixteen thousand, two hundred one".