138222813 has 8 divisors (see below), whose sum is σ = 185224000. Its totient is φ = 91685088.

The previous prime is 138222779. The next prime is 138222827. The reversal of 138222813 is 318222831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138222813 - 2²⁶ = 71113949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138242813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115168 + ... + 116361.

It is an arithmetic number, because the mean of its divisors is an integer number (23153000).

Almost surely, 2^138222813 is an apocalyptic number.

It is an amenable number.

138222813 is a deficient number, since it is larger than the sum of its proper divisors (47001187).

138222813 is a wasteful number, since it uses less digits than its factorization.

138222813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231731.

The product of its digits is 4608, while the sum is 30.

The square root of 138222813 is about 11756.8198506229. The cubic root of 138222813 is about 517.0428963231.

The spelling of 138222813 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, eight hundred thirteen".