138515671 has 8 divisors (see below), whose sum is σ = 162165024. Its totient is φ = 115831680.

The previous prime is 138515647. The next prime is 138515693. The reversal of 138515671 is 176515831.

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 138515671 - 2⁵ = 138515639 is a prime.

It is a super-2 number, since 2×138515671² = 38373182225160482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138515671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138515171) 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, 241030 + ... + 241603.

It is an arithmetic number, because the mean of its divisors is an integer number (20270628).

Almost surely, 2^138515671 is an apocalyptic number.

138515671 is a deficient number, since it is larger than the sum of its proper divisors (23649353).

138515671 is an equidigital number, since it uses as much as digits as its factorization.

138515671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482681.

The product of its digits is 25200, while the sum is 37.

The square root of 138515671 is about 11769.2680740987. The cubic root of 138515671 is about 517.4077983029.

The spelling of 138515671 in words is "one hundred thirty-eight million, five hundred fifteen thousand, six hundred seventy-one".