138201222 has 16 divisors (see below), whose sum is σ = 277278192. Its totient is φ = 45921120.

The previous prime is 138201221. The next prime is 138201233. The reversal of 138201222 is 222102831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138201221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34429 + ... + 38232.

It is an arithmetic number, because the mean of its divisors is an integer number (17329887).

Almost surely, 2^138201222 is an apocalyptic number.

138201222 is an abundant number, since it is smaller than the sum of its proper divisors (139076970).

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

138201222 is a wasteful number, since it uses less digits than its factorization.

138201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72983.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 138201222 is about 11755.9015817588. The cubic root of 138201222 is about 517.0159734772.

The spelling of 138201222 in words is "one hundred thirty-eight million, two hundred one thousand, two hundred twenty-two".