1331213648 has 40 divisors (see below), whose sum is σ = 2620635840. Its totient is φ = 654958080.

The previous prime is 1331213647. The next prime is 1331213683. The reversal of 1331213648 is 8463121331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331213641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893288 + ... + 894776.

It is an arithmetic number, because the mean of its divisors is an integer number (65515896).

Almost surely, 2^1331213648 is an apocalyptic number.

It is an amenable number.

1331213648 is a deficient number, since it is larger than the sum of its proper divisors (1289422192).

1331213648 is a wasteful number, since it uses less digits than its factorization.

1331213648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355 (or 2349 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 1331213648 is about 36485.8006353157. The cubic root of 1331213648 is about 1100.0588530495.

Adding to 1331213648 its reverse (8463121331), we get a palindrome (9794334979).

The spelling of 1331213648 in words is "one billion, three hundred thirty-one million, two hundred thirteen thousand, six hundred forty-eight".