138055205 has 8 divisors (see below), whose sum is σ = 166779000. Its totient is φ = 109702336.

The previous prime is 138055199. The next prime is 138055207. The reversal of 138055205 is 502550831.

It can be written as a sum of positive squares in 4 ways, for example, as 11874916 + 126180289 = 3446^2 + 11233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138055205 - 2²⁶ = 70946341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138055207) 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, 91910 + ... + 93399.

It is an arithmetic number, because the mean of its divisors is an integer number (20847375).

Almost surely, 2^138055205 is an apocalyptic number.

It is an amenable number.

138055205 is a deficient number, since it is larger than the sum of its proper divisors (28723795).

138055205 is a wasteful number, since it uses less digits than its factorization.

138055205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185463.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 138055205 is about 11749.6895703674. The cubic root of 138055205 is about 516.8338242810.

The spelling of 138055205 in words is "one hundred thirty-eight million, fifty-five thousand, two hundred five".