138213267 has 8 divisors (see below), whose sum is σ = 184807824. Its totient is φ = 91880448.

The previous prime is 138213209. The next prime is 138213311. The reversal of 138213267 is 762312831.

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

It is not a de Polignac number, because 138213267 - 2⁶ = 138213203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138213967) 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, 64198 + ... + 66315.

It is an arithmetic number, because the mean of its divisors is an integer number (23100978).

Almost surely, 2^138213267 is an apocalyptic number.

138213267 is a deficient number, since it is larger than the sum of its proper divisors (46594557).

138213267 is a wasteful number, since it uses less digits than its factorization.

138213267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130869.

The product of its digits is 12096, while the sum is 33.

The square root of 138213267 is about 11756.4138664816. The cubic root of 138213267 is about 517.0309933070.

The spelling of 138213267 in words is "one hundred thirty-eight million, two hundred thirteen thousand, two hundred sixty-seven".