1331332331 has 8 divisors (see below), whose sum is σ = 1556907264. Its totient is φ = 1114603560.

The previous prime is 1331332309. The next prime is 1331332333. The reversal of 1331332331 is 1332331331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1331332331 - 2¹⁸ = 1331070187 is a prime.

It is a super-2 number, since 2×1331332331² = 3544891551131787122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331332297 and 1331332306.

It is not an unprimeable number, because it can be changed into a prime (1331332333) 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, 2211215 + ... + 2211816.

It is an arithmetic number, because the mean of its divisors is an integer number (194613408).

Almost surely, 2^1331332331 is an apocalyptic number.

1331332331 is a deficient number, since it is larger than the sum of its proper divisors (225574933).

1331332331 is an equidigital number, since it uses as much as digits as its factorization.

1331332331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423081.

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

The square root of 1331332331 is about 36487.4270263059. The cubic root of 1331332331 is about 1100.0915436211.

Adding to 1331332331 its reverse (1332331331), we get a palindrome (2663663662).

The spelling of 1331332331 in words is "one billion, three hundred thirty-one million, three hundred thirty-two thousand, three hundred thirty-one".