8211855442 has 32 divisors (see below), whose sum is σ = 14859607680. Its totient is φ = 3334097808.

The previous prime is 8211855413. The next prime is 8211855451. The reversal of 8211855442 is 2445581128.

It is a junction number, because it is equal to n+sod(n) for n = 8211855395 and 8211855404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53268 + ... + 138784.

It is an arithmetic number, because the mean of its divisors is an integer number (464362740).

Almost surely, 2^8211855442 is an apocalyptic number.

8211855442 is a deficient number, since it is larger than the sum of its proper divisors (6647752238).

8211855442 is an equidigital number, since it uses as much as digits as its factorization.

8211855442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85583 (or 85545 counting only the distinct ones).

The product of its digits is 102400, while the sum is 40.

The square root of 8211855442 is about 90619.2884655359. The cubic root of 8211855442 is about 2017.5010304400.

The spelling of 8211855442 in words is "eight billion, two hundred eleven million, eight hundred fifty-five thousand, four hundred forty-two".