1216800322 has 4 divisors (see below), whose sum is σ = 1825200486. Its totient is φ = 608400160.

The previous prime is 1216800317. The next prime is 1216800353. The reversal of 1216800322 is 2230086121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2230086121 = 523 ⋅4264027.

It can be written as a sum of positive squares in only one way, i.e., 978375841 + 238424481 = 31279^2 + 15441^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304200079 + ... + 304200082.

Almost surely, 2^1216800322 is an apocalyptic number.

1216800322 is a deficient number, since it is larger than the sum of its proper divisors (608400164).

1216800322 is an equidigital number, since it uses as much as digits as its factorization.

1216800322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608400163.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1216800322 is about 34882.6650644701. The cubic root of 1216800322 is about 1067.5947726684.

Adding to 1216800322 its reverse (2230086121), we get a palindrome (3446886443).

The spelling of 1216800322 in words is "one billion, two hundred sixteen million, eight hundred thousand, three hundred twenty-two".