1311333013 has 8 divisors (see below), whose sum is σ = 1380859200. Its totient is φ = 1241857728.

The previous prime is 1311333007. The next prime is 1311333059. The reversal of 1311333013 is 3103331131.

It is a happy number.

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 1311333013 - 2⁹ = 1311332501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311331013) 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, 47520 + ... + 69862.

It is an arithmetic number, because the mean of its divisors is an integer number (172607400).

Almost surely, 2^1311333013 is an apocalyptic number.

It is an amenable number.

1311333013 is a deficient number, since it is larger than the sum of its proper divisors (69526187).

1311333013 is a wasteful number, since it uses less digits than its factorization.

1311333013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25451.

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

The square root of 1311333013 is about 36212.3323330602. The cubic root of 1311333013 is about 1094.5551908519. Note that the first 3 decimals are identical.

Adding to 1311333013 its reverse (3103331131), we get a palindrome (4414664144).

The spelling of 1311333013 in words is "one billion, three hundred eleven million, three hundred thirty-three thousand, thirteen".