138527227 has 4 divisors (see below), whose sum is σ = 138970120. Its totient is φ = 138084336.

The previous prime is 138527219. The next prime is 138527231. The reversal of 138527227 is 722725831.

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 138527227 - 2³ = 138527219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138527267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220977 + ... + 221602.

It is an arithmetic number, because the mean of its divisors is an integer number (34742530).

Almost surely, 2^138527227 is an apocalyptic number.

138527227 is a deficient number, since it is larger than the sum of its proper divisors (442893).

138527227 is an equidigital number, since it uses as much as digits as its factorization.

138527227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442892.

The product of its digits is 47040, while the sum is 37.

The square root of 138527227 is about 11769.7590034801. The cubic root of 138527227 is about 517.4221865624.

The spelling of 138527227 in words is "one hundred thirty-eight million, five hundred twenty-seven thousand, two hundred twenty-seven".