138223107 has 24 divisors (see below), whose sum is σ = 230621040. Its totient is φ = 78842880.

The previous prime is 138223103. The next prime is 138223121. The reversal of 138223107 is 701322831.

It is not a de Polignac number, because 138223107 - 2² = 138223103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138223103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39382 + ... + 42747.

It is an arithmetic number, because the mean of its divisors is an integer number (9609210).

Almost surely, 2^138223107 is an apocalyptic number.

138223107 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

138223107 is a deficient number, since it is larger than the sum of its proper divisors (92397933).

138223107 is a wasteful number, since it uses less digits than its factorization.

138223107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82163 (or 82160 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 138223107 is about 11756.8323539974. The cubic root of 138223107 is about 517.0432629064.

Adding to 138223107 its reverse (701322831), we get a palindrome (839545938).

The spelling of 138223107 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, one hundred seven".