802082221 has 4 divisors (see below), whose sum is σ = 821645244. Its totient is φ = 782519200.

The previous prime is 802082201. The next prime is 802082227. The reversal of 802082221 is 122280208.

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 441462121 + 360620100 = 21011^2 + 18990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802082221 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 (802082227) 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, 9781450 + ... + 9781531.

It is an arithmetic number, because the mean of its divisors is an integer number (205411311).

Almost surely, 2^802082221 is an apocalyptic number.

It is an amenable number.

802082221 is a deficient number, since it is larger than the sum of its proper divisors (19563023).

802082221 is a wasteful number, since it uses less digits than its factorization.

802082221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19563022.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 802082221 is about 28321.0561420297. The cubic root of 802082221 is about 929.1224701168.

The spelling of 802082221 in words is "eight hundred two million, eighty-two thousand, two hundred twenty-one".