165632331 has 8 divisors (see below), whose sum is σ = 222250384. Its totient is φ = 109717920.

The previous prime is 165632323. The next prime is 165632381. The reversal of 165632331 is 133236561.

It is a happy number.

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

It is not a de Polignac number, because 165632331 - 2³ = 165632323 is a prime.

It is a super-2 number, since 2×165632331² = 54868138144987122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165632381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175360 + ... + 176301.

It is an arithmetic number, because the mean of its divisors is an integer number (27781298).

Almost surely, 2^165632331 is an apocalyptic number.

165632331 is a deficient number, since it is larger than the sum of its proper divisors (56618053).

165632331 is a wasteful number, since it uses less digits than its factorization.

165632331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351821.

The product of its digits is 9720, while the sum is 30.

The square root of 165632331 is about 12869.8224929484. The cubic root of 165632331 is about 549.1804112431.

Adding to 165632331 its reverse (133236561), we get a palindrome (298868892).

The spelling of 165632331 in words is "one hundred sixty-five million, six hundred thirty-two thousand, three hundred thirty-one".