8055331821 has 20 divisors (see below), whose sum is σ = 12036436764. Its totient is φ = 5368809600.

The previous prime is 8055331813. The next prime is 8055331831. The reversal of 8055331821 is 1281335508.

8055331821 is a `hidden beast` number, since 80 + 553 + 3 + 1 + 8 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3577714596 + 4477617225 = 59814^2 + 66915^2 .

It is not a de Polignac number, because 8055331821 - 2³ = 8055331813 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8055331831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 363541 + ... + 385061.

Almost surely, 2^8055331821 is an apocalyptic number.

8055331821 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8055331821 is a deficient number, since it is larger than the sum of its proper divisors (3981104943).

8055331821 is a wasteful number, since it uses less digits than its factorization.

8055331821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26154 (or 26145 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 8055331821 is about 89751.5003830020. The cubic root of 8055331821 is about 2004.6003951521.

The spelling of 8055331821 in words is "eight billion, fifty-five million, three hundred thirty-one thousand, eight hundred twenty-one".