2280220821 has 16 divisors (see below), whose sum is σ = 3378841920. Its totient is φ = 1519815600.

The previous prime is 2280220801. The next prime is 2280220843. The reversal of 2280220821 is 1280220822.

2280220821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2280220821 - 2¹⁸ = 2279958677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2280220801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226546 + ... + 236396.

It is an arithmetic number, because the mean of its divisors is an integer number (211177620).

Almost surely, 2^2280220821 is an apocalyptic number.

It is an amenable number.

2280220821 is a deficient number, since it is larger than the sum of its proper divisors (1098621099).

2280220821 is an equidigital number, since it uses as much as digits as its factorization.

2280220821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18433 (or 18427 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 2280220821 is about 47751.6577827409. The cubic root of 2280220821 is about 1316.2113625723.

Subtracting from 2280220821 its reverse (1280220822), we obtain a palindrome (999999999).

The spelling of 2280220821 in words is "two billion, two hundred eighty million, two hundred twenty thousand, eight hundred twenty-one".