138817516 has 12 divisors (see below), whose sum is σ = 244479088. Its totient is φ = 68966352.

The previous prime is 138817499. The next prime is 138817541. The reversal of 138817516 is 615718831.

138817516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109896 + ... + 111151.

Almost surely, 2^138817516 is an apocalyptic number.

It is an amenable number.

138817516 is a deficient number, since it is larger than the sum of its proper divisors (105661572).

138817516 is a wasteful number, since it uses less digits than its factorization.

138817516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221208 (or 221206 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The square root of 138817516 is about 11782.0845354292. The cubic root of 138817516 is about 517.7833602618.

The spelling of 138817516 in words is "one hundred thirty-eight million, eight hundred seventeen thousand, five hundred sixteen".