8221309506 has 24 divisors (see below), whose sum is σ = 17843205744. Its totient is φ = 2735764440.

The previous prime is 8221309501. The next prime is 8221309549. The reversal of 8221309506 is 6059031228.

It is not an unprimeable number, because it can be changed into a prime (8221309501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378480 + ... + 399611.

It is an arithmetic number, because the mean of its divisors is an integer number (743466906).

Almost surely, 2^8221309506 is an apocalyptic number.

8221309506 is an abundant number, since it is smaller than the sum of its proper divisors (9621896238).

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

8221309506 is a wasteful number, since it uses less digits than its factorization.

8221309506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778686 (or 778683 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 8221309506 is about 90671.4371012173. The cubic root of 8221309506 is about 2018.2749630816.

The spelling of 8221309506 in words is "eight billion, two hundred twenty-one million, three hundred nine thousand, five hundred six".