138171233 has 8 divisors (see below), whose sum is σ = 139095936. Its totient is φ = 137250000.

The previous prime is 138171227. The next prime is 138171251. The reversal of 138171233 is 332171831.

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 138171233 - 2⁴ = 138171217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138171196 and 138171205.

It is not an unprimeable number, because it can be changed into a prime (138171203) 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, 183608 + ... + 184358.

It is an arithmetic number, because the mean of its divisors is an integer number (17386992).

Almost surely, 2^138171233 is an apocalyptic number.

It is an amenable number.

138171233 is a deficient number, since it is larger than the sum of its proper divisors (924703).

138171233 is an equidigital number, since it uses as much as digits as its factorization.

138171233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735.

The product of its digits is 3024, while the sum is 29.

The square root of 138171233 is about 11754.6260255271. The cubic root of 138171233 is about 516.9785741127.

The spelling of 138171233 in words is "one hundred thirty-eight million, one hundred seventy-one thousand, two hundred thirty-three".