138195055 has 16 divisors (see below), whose sum is σ = 171546624. Its totient is φ = 106763040.

The previous prime is 138195053. The next prime is 138195067. The reversal of 138195055 is 550591831.

138195055 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 138195055 - 2¹ = 138195053 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 (138195053) 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, 140094 + ... + 141076.

It is an arithmetic number, because the mean of its divisors is an integer number (10721664).

Almost surely, 2^138195055 is an apocalyptic number.

138195055 is a deficient number, since it is larger than the sum of its proper divisors (33351569).

138195055 is an equidigital number, since it uses as much as digits as its factorization.

138195055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 138195055 is about 11755.6392850410. The cubic root of 138195055 is about 517.0082830364.

The spelling of 138195055 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, fifty-five".