138140223 has 16 divisors (see below), whose sum is σ = 199307136. Its totient is φ = 84601440.

The previous prime is 138140213. The next prime is 138140237. The reversal of 138140223 is 322041831.

It is not a de Polignac number, because 138140223 - 2¹² = 138136127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138140193 and 138140202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138140213) 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 15 ways as a sum of consecutive naturals, for example, 165 + ... + 16622.

It is an arithmetic number, because the mean of its divisors is an integer number (12456696).

Almost surely, 2^138140223 is an apocalyptic number.

138140223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138140223 is a deficient number, since it is larger than the sum of its proper divisors (61166913).

138140223 is a wasteful number, since it uses less digits than its factorization.

138140223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17014.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 138140223 is about 11753.3068963590. The cubic root of 138140223 is about 516.9398957648.

The spelling of 138140223 in words is "one hundred thirty-eight million, one hundred forty thousand, two hundred twenty-three".