138255227 has 4 divisors (see below), whose sum is σ = 150823896. Its totient is φ = 125686560.

The previous prime is 138255223. The next prime is 138255241. The reversal of 138255227 is 722552831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138255227 - 2² = 138255223 is a prime.

It is a super-2 number, since 2×138255227² = 38229015585643058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138255223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6284318 + ... + 6284339.

It is an arithmetic number, because the mean of its divisors is an integer number (37705974).

Almost surely, 2^138255227 is an apocalyptic number.

138255227 is a deficient number, since it is larger than the sum of its proper divisors (12568669).

138255227 is a wasteful number, since it uses less digits than its factorization.

138255227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12568668.

The product of its digits is 33600, while the sum is 35.

The square root of 138255227 is about 11758.1982888536. The cubic root of 138255227 is about 517.0833096196.

The spelling of 138255227 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, two hundred twenty-seven".