138275155 has 4 divisors (see below), whose sum is σ = 165930192. Its totient is φ = 110620120.

The previous prime is 138275153. The next prime is 138275167. The reversal of 138275155 is 551572831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 138275155 - 2¹ = 138275153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138275153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13827511 + ... + 13827520.

It is an arithmetic number, because the mean of its divisors is an integer number (41482548).

Almost surely, 2^138275155 is an apocalyptic number.

138275155 is a deficient number, since it is larger than the sum of its proper divisors (27655037).

138275155 is an equidigital number, since it uses as much as digits as its factorization.

138275155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27655036.

The product of its digits is 42000, while the sum is 37.

The square root of 138275155 is about 11759.0456670599. The cubic root of 138275155 is about 517.1081524203.

The spelling of 138275155 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, one hundred fifty-five".