165032101 has 4 divisors (see below), whose sum is σ = 177726892. Its totient is φ = 152337312.

The previous prime is 165032057. The next prime is 165032111. The reversal of 165032101 is 101230561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101230561 = 29 ⋅3490709.

It can be written as a sum of positive squares in 2 ways, for example, as 45239076 + 119793025 = 6726^2 + 10945^2 .

It is a cyclic number.

It is not a de Polignac number, because 165032101 - 2⁷ = 165031973 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 (165032111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6347376 + ... + 6347401.

It is an arithmetic number, because the mean of its divisors is an integer number (44431723).

Almost surely, 2^165032101 is an apocalyptic number.

It is an amenable number.

165032101 is a deficient number, since it is larger than the sum of its proper divisors (12694791).

165032101 is a wasteful number, since it uses less digits than its factorization.

165032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694790.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 165032101 is about 12846.4820476269. The cubic root of 165032101 is about 548.5162221843.

Adding to 165032101 its reverse (101230561), we get a palindrome (266262662).

The spelling of 165032101 in words is "one hundred sixty-five million, thirty-two thousand, one hundred one".