2284815821 has 4 divisors (see below), whose sum is σ = 2295644544. Its totient is φ = 2273987100.

The previous prime is 2284815811. The next prime is 2284815851. The reversal of 2284815821 is 1285184822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2284815821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2284815811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5414045 + ... + 5414466.

It is an arithmetic number, because the mean of its divisors is an integer number (573911136).

Almost surely, 2^2284815821 is an apocalyptic number.

It is an amenable number.

2284815821 is a deficient number, since it is larger than the sum of its proper divisors (10828723).

2284815821 is a wasteful number, since it uses less digits than its factorization.

2284815821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10828722.

The product of its digits is 81920, while the sum is 41.

The square root of 2284815821 is about 47799.7470809208. The cubic root of 2284815821 is about 1317.0948929669.

The spelling of 2284815821 in words is "two billion, two hundred eighty-four million, eight hundred fifteen thousand, eight hundred twenty-one".