2821821819 has 8 divisors (see below), whose sum is σ = 3763775040. Its totient is φ = 1880541576.

The previous prime is 2821821797. The next prime is 2821821833. The reversal of 2821821819 is 9181281282.

2821821819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2821821819 - 2⁵ = 2821821787 is a prime.

It is a super-2 number, since 2×2821821819² = 15925356756368937522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2821821839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158377 + ... + 175290.

It is an arithmetic number, because the mean of its divisors is an integer number (470471880).

Almost surely, 2^2821821819 is an apocalyptic number.

2821821819 is a deficient number, since it is larger than the sum of its proper divisors (941953221).

2821821819 is a wasteful number, since it uses less digits than its factorization.

2821821819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336489.

The product of its digits is 36864, while the sum is 42.

The square root of 2821821819 is about 53120.8228381301. The cubic root of 2821821819 is about 1413.1118199931. Note that the first 3 decimals are identical.

The spelling of 2821821819 in words is "two billion, eight hundred twenty-one million, eight hundred twenty-one thousand, eight hundred nineteen".