138233615 has 16 divisors (see below), whose sum is σ = 179016096. Its totient is φ = 101865600.

The previous prime is 138233609. The next prime is 138233629. The reversal of 138233615 is 516332831.

138233615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138233615 - 2⁶ = 138233551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33200 + ... + 37130.

It is an arithmetic number, because the mean of its divisors is an integer number (11188506).

Almost surely, 2^138233615 is an apocalyptic number.

138233615 is a deficient number, since it is larger than the sum of its proper divisors (40782481).

138233615 is a wasteful number, since it uses less digits than its factorization.

138233615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490.

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

The square root of 138233615 is about 11757.2792345848. The cubic root of 138233615 is about 517.0563647990.

The spelling of 138233615 in words is "one hundred thirty-eight million, two hundred thirty-three thousand, six hundred fifteen".