1331213344 has 12 divisors (see below), whose sum is σ = 2620826334. Its totient is φ = 665606656.

The previous prime is 1331213341. The next prime is 1331213357. The reversal of 1331213344 is 4433121331.

It can be written as a sum of positive squares in only one way, i.e., 687068944 + 644144400 = 26212^2 + 25380^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1331213341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20800177 + ... + 20800240.

Almost surely, 2^1331213344 is an apocalyptic number.

It is an amenable number.

1331213344 is a deficient number, since it is larger than the sum of its proper divisors (1289612990).

1331213344 is an equidigital number, since it uses as much as digits as its factorization.

1331213344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41600427 (or 41600419 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 1331213344 is about 36485.7964693112. The cubic root of 1331213344 is about 1100.0587693119.

Adding to 1331213344 its reverse (4433121331), we get a palindrome (5764334675).

The spelling of 1331213344 in words is "one billion, three hundred thirty-one million, two hundred thirteen thousand, three hundred forty-four".