1311613365 has 16 divisors (see below), whose sum is σ = 2134152000. Its totient is φ = 687670272.

The previous prime is 1311613361. The next prime is 1311613367. The reversal of 1311613365 is 5633161131.

It is not a de Polignac number, because 1311613365 - 2² = 1311613361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311613361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 740140 + ... + 741909.

It is an arithmetic number, because the mean of its divisors is an integer number (133384500).

Almost surely, 2^1311613365 is an apocalyptic number.

1311613365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311613365 is a deficient number, since it is larger than the sum of its proper divisors (822538635).

1311613365 is a wasteful number, since it uses less digits than its factorization.

1311613365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482116.

The product of its digits is 4860, while the sum is 30.

The square root of 1311613365 is about 36216.2030726580. The cubic root of 1311613365 is about 1094.6331875338.

Adding to 1311613365 its reverse (5633161131), we get a palindrome (6944774496).

The spelling of 1311613365 in words is "one billion, three hundred eleven million, six hundred thirteen thousand, three hundred sixty-five".