138671255 has 16 divisors (see below), whose sum is σ = 174550464. Its totient is φ = 105557760.

The previous prime is 138671249. The next prime is 138671257. The reversal of 138671255 is 552176831.

138671255 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 138671255 - 2⁶ = 138671191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138671257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19595 + ... + 25715.

It is an arithmetic number, because the mean of its divisors is an integer number (10909404).

Almost surely, 2^138671255 is an apocalyptic number.

138671255 is a deficient number, since it is larger than the sum of its proper divisors (35879209).

138671255 is a wasteful number, since it uses less digits than its factorization.

138671255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6346.

The product of its digits is 50400, while the sum is 38.

The square root of 138671255 is about 11775.8759759094. The cubic root of 138671255 is about 517.6014472793.

The spelling of 138671255 in words is "one hundred thirty-eight million, six hundred seventy-one thousand, two hundred fifty-five".