138338522 has 16 divisors (see below), whose sum is σ = 238360320. Its totient is φ = 58985808.

The previous prime is 138338521. The next prime is 138338527. The reversal of 138338522 is 225833831.

138338522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138338521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22322 + ... + 27837.

It is an arithmetic number, because the mean of its divisors is an integer number (14897520).

Almost surely, 2^138338522 is an apocalyptic number.

138338522 is a deficient number, since it is larger than the sum of its proper divisors (100021798).

138338522 is a wasteful number, since it uses less digits than its factorization.

138338522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50365.

The product of its digits is 34560, while the sum is 35.

The square root of 138338522 is about 11761.7397522645. The cubic root of 138338522 is about 517.1871316317.

The spelling of 138338522 in words is "one hundred thirty-eight million, three hundred thirty-eight thousand, five hundred twenty-two".