1331333243 has 8 divisors (see below), whose sum is σ = 1343711040. Its totient is φ = 1318995720.

The previous prime is 1331333239. The next prime is 1331333273. The reversal of 1331333243 is 3423331331.

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 1331333243 - 2² = 1331333239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331333203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58496 + ... + 78002.

It is an arithmetic number, because the mean of its divisors is an integer number (167963880).

Almost surely, 2^1331333243 is an apocalyptic number.

1331333243 is a deficient number, since it is larger than the sum of its proper divisors (12377797).

1331333243 is a wasteful number, since it uses less digits than its factorization.

1331333243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20137.

The product of its digits is 5832, while the sum is 26.

The square root of 1331333243 is about 36487.4395237594. The cubic root of 1331333243 is about 1100.0917948189.

Adding to 1331333243 its reverse (3423331331), we get a palindrome (4754664574).

The spelling of 1331333243 in words is "one billion, three hundred thirty-one million, three hundred thirty-three thousand, two hundred forty-three".