138052505 has 8 divisors (see below), whose sum is σ = 166761024. Its totient is φ = 109710000.

The previous prime is 138052477. The next prime is 138052531. The reversal of 138052505 is 505250831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138052505 - 2¹⁰ = 138051481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90671 + ... + 92180.

It is an arithmetic number, because the mean of its divisors is an integer number (20845128).

Almost surely, 2^138052505 is an apocalyptic number.

It is an amenable number.

138052505 is a deficient number, since it is larger than the sum of its proper divisors (28708519).

138052505 is a wasteful number, since it uses less digits than its factorization.

138052505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183007.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 138052505 is about 11749.5746731531. The cubic root of 138052505 is about 516.8304549515.

The spelling of 138052505 in words is "one hundred thirty-eight million, fifty-two thousand, five hundred five".