1312331333 has 8 divisors (see below), whose sum is σ = 1338035160. Its totient is φ = 1286876160.

The previous prime is 1312331329. The next prime is 1312331341. The reversal of 1312331333 is 3331332131.

It can be written as a sum of positive squares in 4 ways, for example, as 263672644 + 1048658689 = 16238^2 + 32383^2 .

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 1312331333 - 2² = 1312331329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312331299 and 1312331308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312331323) 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, 51488 + ... + 72633.

It is an arithmetic number, because the mean of its divisors is an integer number (167254395).

Almost surely, 2^1312331333 is an apocalyptic number.

It is an amenable number.

1312331333 is a deficient number, since it is larger than the sum of its proper divisors (25703827).

1312331333 is a wasteful number, since it uses less digits than its factorization.

1312331333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124327.

The product of its digits is 1458, while the sum is 23.

The square root of 1312331333 is about 36226.1139649287. The cubic root of 1312331333 is about 1094.8328826228.

Adding to 1312331333 its reverse (3331332131), we get a palindrome (4643663464).

The spelling of 1312331333 in words is "one billion, three hundred twelve million, three hundred thirty-one thousand, three hundred thirty-three".