138223134 has 24 divisors (see below), whose sum is σ = 342267120. Its totient is φ = 39492288.

The previous prime is 138223121. The next prime is 138223153. The reversal of 138223134 is 431322831.

138223134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138223098 and 138223107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 548379 + ... + 548630.

It is an arithmetic number, because the mean of its divisors is an integer number (14261130).

Almost surely, 2^138223134 is an apocalyptic number.

138223134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138223134 is an abundant number, since it is smaller than the sum of its proper divisors (204043986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138223134 is a wasteful number, since it uses less digits than its factorization.

138223134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097024 (or 1097021 counting only the distinct ones).

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

The square root of 138223134 is about 11756.8335022658. The cubic root of 138223134 is about 517.0432965722.

Adding to 138223134 its reverse (431322831), we get a palindrome (569545965).

The spelling of 138223134 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, one hundred thirty-four".