1331423326 has 4 divisors (see below), whose sum is σ = 1997134992. Its totient is φ = 665711662.

The previous prime is 1331423273. The next prime is 1331423329. The reversal of 1331423326 is 6233241331.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1331423294 and 1331423303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331423329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332855830 + ... + 332855833.

It is an arithmetic number, because the mean of its divisors is an integer number (499283748).

Almost surely, 2^1331423326 is an apocalyptic number.

1331423326 is a deficient number, since it is larger than the sum of its proper divisors (665711666).

1331423326 is an equidigital number, since it uses as much as digits as its factorization.

1331423326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665711665.

The product of its digits is 7776, while the sum is 28.

The square root of 1331423326 is about 36488.6739413753. The cubic root of 1331423326 is about 1100.1166063714.

Adding to 1331423326 its reverse (6233241331), we get a palindrome (7564664657).

The spelling of 1331423326 in words is "one billion, three hundred thirty-one million, four hundred twenty-three thousand, three hundred twenty-six".