821334116 has 6 divisors (see below), whose sum is σ = 1437334710. Its totient is φ = 410667056.

The previous prime is 821334091. The next prime is 821334133. The reversal of 821334116 is 611433128.

It can be written as a sum of positive squares in only one way, i.e., 456676900 + 364657216 = 21370^2 + 19096^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102666761 + ... + 102666768.

It is an arithmetic number, because the mean of its divisors is an integer number (239555785).

Almost surely, 2^821334116 is an apocalyptic number.

It is an amenable number.

821334116 is a deficient number, since it is larger than the sum of its proper divisors (616000594).

821334116 is a wasteful number, since it uses less digits than its factorization.

821334116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205333533 (or 205333531 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 821334116 is about 28658.9273351254. The cubic root of 821334116 is about 936.4974968071.

The spelling of 821334116 in words is "eight hundred twenty-one million, three hundred thirty-four thousand, one hundred sixteen".