200161 has 8 divisors (see below), whose sum is σ = 219240. Its totient is φ = 181632.

The previous prime is 200159. The next prime is 200171. The reversal of 200161 is 161002.

200161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14400 + 185761 = 120^2 + 431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200161 - 2¹ = 200159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071 + ... + 1243.

It is an arithmetic number, because the mean of its divisors is an integer number (27405).

2²⁰⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

200161 is a deficient number, since it is larger than the sum of its proper divisors (19079).

200161 is a wasteful number, since it uses less digits than its factorization.

200161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

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

The square root of 200161 is about 447.3935627610. The cubic root of 200161 is about 58.4960427839.

Adding to 200161 its reverse (161002), we get a palindrome (361163).

It can be divided in two parts, 200 and 161, that added together give a square (361 = 19²).

The spelling of 200161 in words is "two hundred thousand, one hundred sixty-one".