138517532 has 12 divisors (see below), whose sum is σ = 243625200. Its totient is φ = 68910336.

The previous prime is 138517501. The next prime is 138517559. The reversal of 138517532 is 235715831.

It is a junction number, because it is equal to n+sod(n) for n = 138517492 and 138517501.

It is a congruent number.

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, 86213 + ... + 87804.

It is an arithmetic number, because the mean of its divisors is an integer number (20302100).

Almost surely, 2^138517532 is an apocalyptic number.

It is an amenable number.

138517532 is a deficient number, since it is larger than the sum of its proper divisors (105107668).

138517532 is a wasteful number, since it uses less digits than its factorization.

138517532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174220 (or 174218 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 138517532 is about 11769.3471356741. The cubic root of 138517532 is about 517.4101154693.

The spelling of 138517532 in words is "one hundred thirty-eight million, five hundred seventeen thousand, five hundred thirty-two".