1331312333 has 4 divisors (see below), whose sum is σ = 1433720988. Its totient is φ = 1228903680.

The previous prime is 1331312327. The next prime is 1331312341. The reversal of 1331312333 is 3332131331.

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 531440809 + 799871524 = 23053^2 + 28282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331312333 - 2¹⁰ = 1331311309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331312299 and 1331312308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331312303) 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, 51204308 + ... + 51204333.

It is an arithmetic number, because the mean of its divisors is an integer number (358430247).

Almost surely, 2^1331312333 is an apocalyptic number.

1331312333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1331312333 is a deficient number, since it is larger than the sum of its proper divisors (102408655).

1331312333 is a wasteful number, since it uses less digits than its factorization.

1331312333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102408654.

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

The square root of 1331312333 is about 36487.1529856743. The cubic root of 1331312333 is about 1100.0860354194.

Adding to 1331312333 its reverse (3332131331), we get a palindrome (4663443664).

The spelling of 1331312333 in words is "one billion, three hundred thirty-one million, three hundred twelve thousand, three hundred thirty-three".