805873221 has 6 divisors (see below), whose sum is σ = 1164039110. Its totient is φ = 537248808.

The previous prime is 805873193. The next prime is 805873223. The reversal of 805873221 is 122378508.

It can be written as a sum of positive squares in only one way, i.e., 565964100 + 239909121 = 23790^2 + 15489^2 .

It is not a de Polignac number, because 805873221 - 2⁶ = 805873157 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 (805873223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44770726 + ... + 44770743.

Almost surely, 2^805873221 is an apocalyptic number.

It is an amenable number.

805873221 is a deficient number, since it is larger than the sum of its proper divisors (358165889).

805873221 is a wasteful number, since it uses less digits than its factorization.

805873221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89541475 (or 89541472 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 805873221 is about 28387.9062454419. The cubic root of 805873221 is about 930.5839863179.

The spelling of 805873221 in words is "eight hundred five million, eight hundred seventy-three thousand, two hundred twenty-one".