12311313515 has 8 divisors (see below), whose sum is σ = 14794417680. Its totient is φ = 9835156512.

The previous prime is 12311313491. The next prime is 12311313517. The reversal of 12311313515 is 51531311321.

It is a happy number.

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 12311313515 - 2¹⁶ = 12311247979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12311313517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732889 + ... + 1739978.

It is an arithmetic number, because the mean of its divisors is an integer number (1849302210).

Almost surely, 2^12311313515 is an apocalyptic number.

12311313515 is a deficient number, since it is larger than the sum of its proper divisors (2483104165).

12311313515 is an equidigital number, since it uses as much as digits as its factorization.

12311313515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473581.

The product of its digits is 1350, while the sum is 26.

Adding to 12311313515 its reverse (51531311321), we get a palindrome (63842624836).

The spelling of 12311313515 in words is "twelve billion, three hundred eleven million, three hundred thirteen thousand, five hundred fifteen".