821283365 has 12 divisors (see below), whose sum is σ = 1146444876. Its totient is φ = 563165568.

The previous prime is 821283349. The next prime is 821283373. The reversal of 821283365 is 563382128.

821283365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 297010756 + 524272609 = 17234^2 + 22897^2 .

It is not a de Polignac number, because 821283365 - 2⁴ = 821283349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1675844 + ... + 1676333.

It is an arithmetic number, because the mean of its divisors is an integer number (95537073).

Almost surely, 2^821283365 is an apocalyptic number.

It is an amenable number.

821283365 is a deficient number, since it is larger than the sum of its proper divisors (325161511).

821283365 is a wasteful number, since it uses less digits than its factorization.

821283365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352196 (or 3352189 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 821283365 is about 28658.0418905410. The cubic root of 821283365 is about 936.4782073923.

The spelling of 821283365 in words is "eight hundred twenty-one million, two hundred eighty-three thousand, three hundred sixty-five".