138711515 has 16 divisors (see below), whose sum is σ = 172385280. Its totient is φ = 107038560.

The previous prime is 138711491. The next prime is 138711527. The reversal of 138711515 is 515117831.

It is a happy number.

It is not a de Polignac number, because 138711515 - 2⁸ = 138711259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52496 + ... + 55074.

It is an arithmetic number, because the mean of its divisors is an integer number (10774080).

Almost surely, 2^138711515 is an apocalyptic number.

138711515 is a deficient number, since it is larger than the sum of its proper divisors (33673765).

138711515 is a wasteful number, since it uses less digits than its factorization.

138711515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962.

The product of its digits is 4200, while the sum is 32.

The square root of 138711515 is about 11777.5852788252. The cubic root of 138711515 is about 517.6515336458.

The spelling of 138711515 in words is "one hundred thirty-eight million, seven hundred eleven thousand, five hundred fifteen".