138503227 has 4 divisors (see below), whose sum is σ = 138675240. Its totient is φ = 138331216.

The previous prime is 138503221. The next prime is 138503243. The reversal of 138503227 is 722305831.

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 138503227 - 2²⁷ = 4285499 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138503221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84793 + ... + 86410.

It is an arithmetic number, because the mean of its divisors is an integer number (34668810).

Almost surely, 2^138503227 is an apocalyptic number.

138503227 is a deficient number, since it is larger than the sum of its proper divisors (172013).

138503227 is an equidigital number, since it uses as much as digits as its factorization.

138503227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172012.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 138503227 is about 11768.7393972337. The cubic root of 138503227 is about 517.3923035086.

The spelling of 138503227 in words is "one hundred thirty-eight million, five hundred three thousand, two hundred twenty-seven".