165216141 has 6 divisors (see below), whose sum is σ = 238645550. Its totient is φ = 110144088.

The previous prime is 165216133. The next prime is 165216151. The reversal of 165216141 is 141612561.

165216141 is a `hidden beast` number, since 1 + 652 + 1 + 6 + 1 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162562500 + 2653641 = 12750^2 + 1629^2 .

It is not a de Polignac number, because 165216141 - 2³ = 165216133 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165216131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9178666 + ... + 9178683.

Almost surely, 2^165216141 is an apocalyptic number.

It is an amenable number.

165216141 is a deficient number, since it is larger than the sum of its proper divisors (73429409).

165216141 is a wasteful number, since it uses less digits than its factorization.

165216141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18357355 (or 18357352 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 165216141 is about 12853.6431022493. The cubic root of 165216141 is about 548.7200439920.

The spelling of 165216141 in words is "one hundred sixty-five million, two hundred sixteen thousand, one hundred forty-one".