13128311215 has 8 divisors (see below), whose sum is σ = 15791574960. Its totient is φ = 10477581312.

The previous prime is 13128311201. The next prime is 13128311219. The reversal of 13128311215 is 51211382131.

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 13128311215 - 2¹⁵ = 13128278447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128311219) 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, 3131154 + ... + 3135343.

It is an arithmetic number, because the mean of its divisors is an integer number (1973946870).

Almost surely, 2^13128311215 is an apocalyptic number.

13128311215 is a deficient number, since it is larger than the sum of its proper divisors (2663263745).

13128311215 is an equidigital number, since it uses as much as digits as its factorization.

13128311215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6266921.

The product of its digits is 1440, while the sum is 28.

Adding to 13128311215 its reverse (51211382131), we get a palindrome (64339693346).

The spelling of 13128311215 in words is "thirteen billion, one hundred twenty-eight million, three hundred eleven thousand, two hundred fifteen".