138320223 has 4 divisors (see below), whose sum is σ = 184426968. Its totient is φ = 92213480.

The previous prime is 138320213. The next prime is 138320251. The reversal of 138320223 is 322023831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322023831 = 3 ⋅107341277.

It is a cyclic number.

It is not a de Polignac number, because 138320223 - 2⁶ = 138320159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138320193 and 138320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138320213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23053368 + ... + 23053373.

It is an arithmetic number, because the mean of its divisors is an integer number (46106742).

Almost surely, 2^138320223 is an apocalyptic number.

138320223 is a deficient number, since it is larger than the sum of its proper divisors (46106745).

138320223 is an equidigital number, since it uses as much as digits as its factorization.

138320223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46106744.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 138320223 is about 11760.9618229123. The cubic root of 138320223 is about 517.1643266446.

The spelling of 138320223 in words is "one hundred thirty-eight million, three hundred twenty thousand, two hundred twenty-three".