805282821 has 12 divisors (see below), whose sum is σ = 1329355872. Its totient is φ = 460161576.

The previous prime is 805282813. The next prime is 805282823. The reversal of 805282821 is 128282508.

It is a happy number.

It is not a de Polignac number, because 805282821 - 2³ = 805282813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805282823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6391071 + ... + 6391196.

It is an arithmetic number, because the mean of its divisors is an integer number (110779656).

Almost surely, 2^805282821 is an apocalyptic number.

It is an amenable number.

805282821 is a deficient number, since it is larger than the sum of its proper divisors (524073051).

805282821 is a wasteful number, since it uses less digits than its factorization.

805282821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12782280 (or 12782277 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 805282821 is about 28377.5055457664. The cubic root of 805282821 is about 930.3566755378.

The spelling of 805282821 in words is "eight hundred five million, two hundred eighty-two thousand, eight hundred twenty-one".