1311033313 has 4 divisors (see below), whose sum is σ = 1311826180. Its totient is φ = 1310240448.

The previous prime is 1311033299. The next prime is 1311033341. The reversal of 1311033313 is 3133301131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 558518689 + 752514624 = 23633^2 + 27432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311033313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311034313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393948 + ... + 397261.

It is an arithmetic number, because the mean of its divisors is an integer number (327956545).

Almost surely, 2^1311033313 is an apocalyptic number.

It is an amenable number.

1311033313 is a deficient number, since it is larger than the sum of its proper divisors (792867).

1311033313 is an equidigital number, since it uses as much as digits as its factorization.

1311033313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792866.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1311033313 is about 36208.1940035678. The cubic root of 1311033313 is about 1094.4717990714.

Adding to 1311033313 its reverse (3133301131), we get a palindrome (4444334444).

The spelling of 1311033313 in words is "one billion, three hundred eleven million, thirty-three thousand, three hundred thirteen".