816228013 has 8 divisors (see below), whose sum is σ = 821703168. Its totient is φ = 810761904.

The previous prime is 816227981. The next prime is 816228019. The reversal of 816228013 is 310822618.

816228013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 816228013 - 2⁵ = 816227981 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 (816228019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355756 + ... + 358042.

It is an arithmetic number, because the mean of its divisors is an integer number (102712896).

Almost surely, 2^816228013 is an apocalyptic number.

It is an amenable number.

816228013 is a deficient number, since it is larger than the sum of its proper divisors (5475155).

816228013 is a wasteful number, since it uses less digits than its factorization.

816228013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4523.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 816228013 is about 28569.7044611946. The cubic root of 816228013 is about 934.5527761021.

The spelling of 816228013 in words is "eight hundred sixteen million, two hundred twenty-eight thousand, thirteen".