1331013305 has 8 divisors (see below), whose sum is σ = 1597413312. Its totient is φ = 1064679088.

The previous prime is 1331013301. The next prime is 1331013329. The reversal of 1331013305 is 5033101331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331013305 - 2² = 1331013301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331013301) 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, 62684 + ... + 81186.

It is an arithmetic number, because the mean of its divisors is an integer number (199676664).

Almost surely, 2^1331013305 is an apocalyptic number.

It is an amenable number.

1331013305 is a deficient number, since it is larger than the sum of its proper divisors (266400007).

1331013305 is a wasteful number, since it uses less digits than its factorization.

1331013305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32895.

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 1331013305 is about 36483.0550392919. The cubic root of 1331013305 is about 1100.0036652770.

Adding to 1331013305 its reverse (5033101331), we get a palindrome (6364114636).

The spelling of 1331013305 in words is "one billion, three hundred thirty-one million, thirteen thousand, three hundred five".