138171216 has 40 divisors (see below), whose sum is σ = 368460544. Its totient is φ = 44570880.

The previous prime is 138171203. The next prime is 138171217. The reversal of 138171216 is 612171831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138171217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44941 + ... + 47916.

Almost surely, 2^138171216 is an apocalyptic number.

138171216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138171216 is an abundant number, since it is smaller than the sum of its proper divisors (230289328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138171216 is a wasteful number, since it uses less digits than its factorization.

138171216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92899 (or 92893 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 138171216 is about 11754.6253024076. The cubic root of 138171216 is about 516.9785529104.

The spelling of 138171216 in words is "one hundred thirty-eight million, one hundred seventy-one thousand, two hundred sixteen".