138332165 has 8 divisors (see below), whose sum is σ = 166066200. Its totient is φ = 110620672.

The previous prime is 138332149. The next prime is 138332177. The reversal of 138332165 is 561233831.

It can be written as a sum of positive squares in 4 ways, for example, as 13942756 + 124389409 = 3734^2 + 11153^2 .

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 138332165 - 2⁴ = 138332149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14261 + ... + 21909.

It is an arithmetic number, because the mean of its divisors is an integer number (20758275).

Almost surely, 2^138332165 is an apocalyptic number.

It is an amenable number.

138332165 is a deficient number, since it is larger than the sum of its proper divisors (27734035).

138332165 is an equidigital number, since it uses as much as digits as its factorization.

138332165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11271.

The product of its digits is 12960, while the sum is 32.

The square root of 138332165 is about 11761.4695085266. The cubic root of 138332165 is about 517.1792094977.

Adding to 138332165 its reverse (561233831), we get a palindrome (699565996).

The spelling of 138332165 in words is "one hundred thirty-eight million, three hundred thirty-two thousand, one hundred sixty-five".