3318220816 has 15 divisors (see below), whose sum is σ = 6429499293. Its totient is φ = 1658995200.

The previous prime is 3318220813. The next prime is 3318220817. The reversal of 3318220816 is 6180228133.

It is a happy number.

The square root of 3318220816 is 57604.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3317299216 + 921600 = 57596^2 + 960^2 .

It is a super-2 number, since 2×3318220816² = 22021178767471411712, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3318220813) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 223216 + ... + 237616.

Almost surely, 2^3318220816 is an apocalyptic number.

3318220816 is the 57604-th square number.

It is an amenable number.

3318220816 is a deficient number, since it is larger than the sum of its proper divisors (3111278477).

3318220816 is an frugal number, since it uses more digits than its factorization.

3318220816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28810 (or 14403 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The cubic root of 3318220816 is about 1491.5406516699.

Adding to 3318220816 its reverse (6180228133), we get a palindrome (9498448949).

The spelling of 3318220816 in words is "three billion, three hundred eighteen million, two hundred twenty thousand, eight hundred sixteen".