138358055 has 24 divisors (see below), whose sum is σ = 185123232. Its totient is φ = 99176000.

The previous prime is 138358049. The next prime is 138358061. The reversal of 138358055 is 550853831.

It is an interprime number because it is at equal distance from previous prime (138358049) and next prime (138358061).

It is a de Polignac number, because none of the positive numbers 2^k-138358055 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 41345 + ... + 44565.

It is an arithmetic number, because the mean of its divisors is an integer number (7713468).

Almost surely, 2^138358055 is an apocalyptic number.

138358055 is a deficient number, since it is larger than the sum of its proper divisors (46765177).

138358055 is a wasteful number, since it uses less digits than its factorization.

138358055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319 (or 3308 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 138358055 is about 11762.5700848071. The cubic root of 138358055 is about 517.2114722629.

The spelling of 138358055 in words is "one hundred thirty-eight million, three hundred fifty-eight thousand, fifty-five".