138223017 has 48 divisors (see below), whose sum is σ = 218050560. Its totient is φ = 87382800.

The previous prime is 138222989. The next prime is 138223037. The reversal of 138223017 is 710322831.

138223017 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 138223017 - 2⁸ = 138222761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (138223037) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 444292 + ... + 444602.

It is an arithmetic number, because the mean of its divisors is an integer number (4542720).

Almost surely, 2^138223017 is an apocalyptic number.

It is an amenable number.

138223017 is a deficient number, since it is larger than the sum of its proper divisors (79827543).

138223017 is an equidigital number, since it uses as much as digits as its factorization.

138223017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 138223017 is about 11756.8285264352. The cubic root of 138223017 is about 517.0431506871.

Adding to 138223017 its reverse (710322831), we get a palindrome (848545848).

The spelling of 138223017 in words is "one hundred thirty-eight million, two hundred twenty-three thousand, seventeen".