201338161 has 8 divisors (see below), whose sum is σ = 204874920. Its totient is φ = 197822592.

The previous prime is 201338129. The next prime is 201338171. The reversal of 201338161 is 161833102.

It can be written as a sum of positive squares in 4 ways, for example, as 577600 + 200760561 = 760^2 + 14169^2 .

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 201338161 - 2⁵ = 201338129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201338171) 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, 14511 + ... + 24763.

It is an arithmetic number, because the mean of its divisors is an integer number (25609365).

Almost surely, 2^201338161 is an apocalyptic number.

It is an amenable number.

201338161 is a deficient number, since it is larger than the sum of its proper divisors (3536759).

201338161 is a wasteful number, since it uses less digits than its factorization.

201338161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10595.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 201338161 is about 14189.3678858503. The cubic root of 201338161 is about 586.1049183712.

The spelling of 201338161 in words is "two hundred one million, three hundred thirty-eight thousand, one hundred sixty-one".