1331321330 has 8 divisors (see below), whose sum is σ = 2396378412. Its totient is φ = 532528528.

The previous prime is 1331321311. The next prime is 1331321333. The reversal of 1331321330 is 331231331.

It can be written as a sum of positive squares in 2 ways, for example, as 1308920041 + 22401289 = 36179^2 + 4733^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1331321333) 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, 66566057 + ... + 66566076.

Almost surely, 2^1331321330 is an apocalyptic number.

1331321330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331321330 is a deficient number, since it is larger than the sum of its proper divisors (1065057082).

1331321330 is a wasteful number, since it uses less digits than its factorization.

1331321330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133132140.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1331321330 is about 36487.2762754361. The cubic root of 1331321330 is about 1100.0885135386.

Adding to 1331321330 its reverse (331231331), we get a palindrome (1662552661).

It can be divided in two parts, 13313 and 21330, that added together give a palindrome (34643).

The spelling of 1331321330 in words is "one billion, three hundred thirty-one million, three hundred twenty-one thousand, three hundred thirty".