806221 has 4 divisors (see below), whose sum is σ = 868252. Its totient is φ = 744192.

The previous prime is 806213. The next prime is 806233. The reversal of 806221 is 122608.

It is a happy number.

806221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 260100 = 739^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 806221 - 2³ = 806213 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 (806261) 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, 30996 + ... + 31021.

It is an arithmetic number, because the mean of its divisors is an integer number (217063).

2⁸⁰⁶²²¹ is an apocalyptic number.

It is an amenable number.

806221 is a deficient number, since it is larger than the sum of its proper divisors (62031).

806221 is a wasteful number, since it uses less digits than its factorization.

806221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62030.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 806221 is about 897.8981011228. The cubic root of 806221 is about 93.0717833270.

Adding to 806221 its reverse (122608), we get a palindrome (928829).

The spelling of 806221 in words is "eight hundred six thousand, two hundred twenty-one".