1216299313 has 8 divisors (see below), whose sum is σ = 1238849280. Its totient is φ = 1193833680.

The previous prime is 1216299277. The next prime is 1216299319. The reversal of 1216299313 is 3139926121.

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 1216299313 - 2⁹ = 1216298801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216299319) 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, 8406 + ... + 50032.

It is an arithmetic number, because the mean of its divisors is an integer number (154856160).

Almost surely, 2^1216299313 is an apocalyptic number.

It is an amenable number.

1216299313 is a deficient number, since it is larger than the sum of its proper divisors (22549967).

1216299313 is an equidigital number, since it uses as much as digits as its factorization.

1216299313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42167.

The product of its digits is 17496, while the sum is 37.

The square root of 1216299313 is about 34875.4829787345. The cubic root of 1216299313 is about 1067.4482276665.

The spelling of 1216299313 in words is "one billion, two hundred sixteen million, two hundred ninety-nine thousand, three hundred thirteen".