816224809 has 8 divisors (see below), whose sum is σ = 830213120. Its totient is φ = 802354896.

The previous prime is 816224803. The next prime is 816224837. The reversal of 816224809 is 908422618.

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 816224809 - 2¹⁷ = 816093737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816224803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15639 + ... + 43324.

It is an arithmetic number, because the mean of its divisors is an integer number (103776640).

Almost surely, 2^816224809 is an apocalyptic number.

It is an amenable number.

816224809 is a deficient number, since it is larger than the sum of its proper divisors (13988311).

816224809 is a wasteful number, since it uses less digits than its factorization.

816224809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59199.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 816224809 is about 28569.6483877558. The cubic root of 816224809 is about 934.5515532775.

It can be divided in two parts, 816 and 224809, that added together give a square (225625 = 475²).

The spelling of 816224809 in words is "eight hundred sixteen million, two hundred twenty-four thousand, eight hundred nine".