138222256 has 10 divisors (see below), whose sum is σ = 267805652. Its totient is φ = 69111120.

The previous prime is 138222247. The next prime is 138222263. The reversal of 138222256 is 652222831.

138222256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319430 + ... + 4319461.

Almost surely, 2^138222256 is an apocalyptic number.

138222256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138222256 is a deficient number, since it is larger than the sum of its proper divisors (129583396).

138222256 is an equidigital number, since it uses as much as digits as its factorization.

138222256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638899 (or 8638893 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 138222256 is about 11756.7961622204. The cubic root of 138222256 is about 517.0422018085.

The spelling of 138222256 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, two hundred fifty-six".