138223143 has 12 divisors (see below), whose sum is σ = 200364840. Its totient is φ = 91821456.

The previous prime is 138223121. The next prime is 138223153. The reversal of 138223143 is 341322831.

138223143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138223143 - 2²⁴ = 121445927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138223103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24588 + ... + 29681.

It is an arithmetic number, because the mean of its divisors is an integer number (16697070).

Almost surely, 2^138223143 is an apocalyptic number.

138223143 is a deficient number, since it is larger than the sum of its proper divisors (62141697).

138223143 is a wasteful number, since it uses less digits than its factorization.

138223143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54558 (or 54555 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 138223143 is about 11756.8338850219. The cubic root of 138223143 is about 517.0433077941.

Adding to 138223143 its reverse (341322831), we get a palindrome (479545974).

The spelling of 138223143 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, one hundred forty-three".