138533222 has 4 divisors (see below), whose sum is σ = 207799836. Its totient is φ = 69266610.

The previous prime is 138533183. The next prime is 138533231. The reversal of 138533222 is 222335831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34633304 + ... + 34633307.

It is an arithmetic number, because the mean of its divisors is an integer number (51949959).

Almost surely, 2^138533222 is an apocalyptic number.

138533222 is a deficient number, since it is larger than the sum of its proper divisors (69266614).

138533222 is an equidigital number, since it uses as much as digits as its factorization.

138533222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69266613.

The product of its digits is 8640, while the sum is 29.

The square root of 138533222 is about 11770.0136788366. The cubic root of 138533222 is about 517.4296505614.

The spelling of 138533222 in words is "one hundred thirty-eight million, five hundred thirty-three thousand, two hundred twenty-two".