803128221 has 48 divisors (see below), whose sum is σ = 1344081024. Its totient is φ = 452656512.

The previous prime is 803128211. The next prime is 803128259. The reversal of 803128221 is 122821308.

It is not a de Polignac number, because 803128221 - 2⁵ = 803128189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (803128211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2022795 + ... + 2023191.

It is an arithmetic number, because the mean of its divisors is an integer number (28001688).

Almost surely, 2^803128221 is an apocalyptic number.

It is an amenable number.

803128221 is a deficient number, since it is larger than the sum of its proper divisors (540952803).

803128221 is a wasteful number, since it uses less digits than its factorization.

803128221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 803128221 is about 28339.5169507174. The cubic root of 803128221 is about 929.5261859761.

Adding to 803128221 its reverse (122821308), we get a palindrome (925949529).

The spelling of 803128221 in words is "eight hundred three million, one hundred twenty-eight thousand, two hundred twenty-one".