138215 has 16 divisors (see below), whose sum is σ = 207360. Its totient is φ = 85920.

The previous prime is 138209. The next prime is 138239. The reversal of 138215 is 512831.

It is not a de Polignac number, because 138215 - 2¹⁰ = 137191 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 206 + ... + 564.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2¹³⁸²¹⁵ is an apocalyptic number.

138215 is a deficient number, since it is larger than the sum of its proper divisors (69145).

138215 is a wasteful number, since it uses less digits than its factorization.

138215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its digits is 240, while the sum is 20.

The square root of 138215 is about 371.7727800687. The cubic root of 138215 is about 51.7033154245.

It can be divided in two parts, 138 and 215, that added together give a palindrome (353).

The spelling of 138215 in words is "one hundred thirty-eight thousand, two hundred fifteen".