1331913218 has 16 divisors (see below), whose sum is σ = 2114830080. Its totient is φ = 628038096.

The previous prime is 1331913199. The next prime is 1331913241. The reversal of 1331913218 is 8123191331.

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 264530 + ... + 269517.

It is an arithmetic number, because the mean of its divisors is an integer number (132176880).

Almost surely, 2^1331913218 is an apocalyptic number.

1331913218 is a deficient number, since it is larger than the sum of its proper divisors (782916862).

1331913218 is a wasteful number, since it uses less digits than its factorization.

1331913218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534121.

The product of its digits is 3888, while the sum is 32.

The square root of 1331913218 is about 36495.3862563475. The cubic root of 1331913218 is about 1100.2515176921.

The spelling of 1331913218 in words is "one billion, three hundred thirty-one million, nine hundred thirteen thousand, two hundred eighteen".