138223135 has 32 divisors (see below), whose sum is σ = 177292800. Its totient is φ = 103286400.

The previous prime is 138223121. The next prime is 138223153. The reversal of 138223135 is 531322831.

It is not a de Polignac number, because 138223135 - 2⁵ = 138223103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 915310 + ... + 915460.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^138223135 is an apocalyptic number.

138223135 is a deficient number, since it is larger than the sum of its proper divisors (39069665).

138223135 is a wasteful number, since it uses less digits than its factorization.

138223135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its digits is 4320, while the sum is 28.

The square root of 138223135 is about 11756.8335447943. The cubic root of 138223135 is about 517.0432978190.

Adding to 138223135 its reverse (531322831), we get a palindrome (669545966).

The spelling of 138223135 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, one hundred thirty-five".