1331322613 has 8 divisors (see below), whose sum is σ = 1363119296. Its totient is φ = 1299564000.

The previous prime is 1331322607. The next prime is 1331322617. The reversal of 1331322613 is 3162231331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331322613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331322617) 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, 68848 + ... + 86038.

It is an arithmetic number, because the mean of its divisors is an integer number (170389912).

Almost surely, 2^1331322613 is an apocalyptic number.

It is an amenable number.

1331322613 is a deficient number, since it is larger than the sum of its proper divisors (31796683).

1331322613 is a wasteful number, since it uses less digits than its factorization.

1331322613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19035.

The product of its digits is 1944, while the sum is 25.

The square root of 1331322613 is about 36487.2938569031. The cubic root of 1331322613 is about 1100.0888669251.

Adding to 1331322613 its reverse (3162231331), we get a palindrome (4493553944).

The spelling of 1331322613 in words is "one billion, three hundred thirty-one million, three hundred twenty-two thousand, six hundred thirteen".