8139222 has 48 divisors (see below), whose sum is σ = 21708960. Its totient is φ = 2146176.

The previous prime is 8139221. The next prime is 8139251. The reversal of 8139222 is 2229318.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8139221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 847 + ... + 4122.

It is an arithmetic number, because the mean of its divisors is an integer number (452270).

Almost surely, 2^8139222 is an apocalyptic number.

8139222 is an abundant number, since it is smaller than the sum of its proper divisors (13569738).

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

8139222 is a wasteful number, since it uses less digits than its factorization.

8139222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997 (or 4994 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 8139222 is about 2852.9321758500. The cubic root of 8139222 is about 201.1535175293.

The spelling of 8139222 in words is "eight million, one hundred thirty-nine thousand, two hundred twenty-two".