138231875 has 10 divisors (see below), whose sum is σ = 172735332. Its totient is φ = 110585000.

The previous prime is 138231809. The next prime is 138231901. The reversal of 138231875 is 578132831.

It is a happy number.

It is not a de Polignac number, because 138231875 - 2⁸ = 138231619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 109961 + ... + 111210.

Almost surely, 2^138231875 is an apocalyptic number.

138231875 is a deficient number, since it is larger than the sum of its proper divisors (34503457).

138231875 is an frugal number, since it uses more digits than its factorization.

138231875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221191 (or 221176 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 138231875 is about 11757.2052376404. The cubic root of 138231875 is about 517.0541953271.

The spelling of 138231875 in words is "one hundred thirty-eight million, two hundred thirty-one thousand, eight hundred seventy-five".