816222345 has 16 divisors (see below), whose sum is σ = 1336327872. Its totient is φ = 425194560.

The previous prime is 816222287. The next prime is 816222347. The reversal of 816222345 is 543222618.

It is not a de Polignac number, because 816222345 - 2⁷ = 816222217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816222347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632086 + ... + 633375.

It is an arithmetic number, because the mean of its divisors is an integer number (83520492).

Almost surely, 2^816222345 is an apocalyptic number.

It is an amenable number.

816222345 is a deficient number, since it is larger than the sum of its proper divisors (520105527).

816222345 is a wasteful number, since it uses less digits than its factorization.

816222345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265512.

The product of its digits is 23040, while the sum is 33.

The square root of 816222345 is about 28569.6052650365. The cubic root of 816222345 is about 934.5506128759.

The spelling of 816222345 in words is "eight hundred sixteen million, two hundred twenty-two thousand, three hundred forty-five".