138055055 has 4 divisors (see below), whose sum is σ = 165666072. Its totient is φ = 110444040.

The previous prime is 138055033. The next prime is 138055061. The reversal of 138055055 is 550550831.

138055055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550550831 = 17 ⋅32385343.

It is not a de Polignac number, because 138055055 - 2¹⁰ = 138054031 is a prime.

It is a super-2 number, since 2×138055055² = 38118396422106050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13805501 + ... + 13805510.

It is an arithmetic number, because the mean of its divisors is an integer number (41416518).

Almost surely, 2^138055055 is an apocalyptic number.

138055055 is a deficient number, since it is larger than the sum of its proper divisors (27611017).

138055055 is an equidigital number, since it uses as much as digits as its factorization.

138055055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27611016.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 138055055 is about 11749.6831872183. The cubic root of 138055055 is about 516.8336370971.

The spelling of 138055055 in words is "one hundred thirty-eight million, fifty-five thousand, fifty-five".