138226417 has 4 divisors (see below), whose sum is σ = 157973056. Its totient is φ = 118479780.

The previous prime is 138226397. The next prime is 138226423. The reversal of 138226417 is 714622831.

138226417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 714622831 = 13 ⋅54970987.

It is a cyclic number.

It is not a de Polignac number, because 138226417 - 2⁷ = 138226289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138226447) 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, 9873309 + ... + 9873322.

It is an arithmetic number, because the mean of its divisors is an integer number (39493264).

Almost surely, 2^138226417 is an apocalyptic number.

It is an amenable number.

138226417 is a deficient number, since it is larger than the sum of its proper divisors (19746639).

138226417 is an equidigital number, since it uses as much as digits as its factorization.

138226417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19746638.

The product of its digits is 16128, while the sum is 34.

The square root of 138226417 is about 11756.9731223644. The cubic root of 138226417 is about 517.0473900493.

The spelling of 138226417 in words is "one hundred thirty-eight million, two hundred twenty-six thousand, four hundred seventeen".