138275715 has 16 divisors (see below), whose sum is σ = 224869536. Its totient is φ = 72537600.

The previous prime is 138275693. The next prime is 138275719. The reversal of 138275715 is 517572831.

It is not a de Polignac number, because 138275715 - 2¹⁰ = 138274691 is a prime.

It is a super-2 number, since 2×138275715² = 38240346717522450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138275719) 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, 74646 + ... + 76475.

It is an arithmetic number, because the mean of its divisors is an integer number (14054346).

Almost surely, 2^138275715 is an apocalyptic number.

138275715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138275715 is a deficient number, since it is larger than the sum of its proper divisors (86593821).

138275715 is a wasteful number, since it uses less digits than its factorization.

138275715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151190.

The product of its digits is 58800, while the sum is 39.

The square root of 138275715 is about 11759.0694784919. The cubic root of 138275715 is about 517.1088504974.

It can be divided in two parts, 13 and 8275715, that added together give a palindrome (8275728).

The spelling of 138275715 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, seven hundred fifteen".