12613512215 has 4 divisors (see below), whose sum is σ = 15136214664. Its totient is φ = 10090809768.

The previous prime is 12613512211. The next prime is 12613512239. The reversal of 12613512215 is 51221531621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12613512215 - 2² = 12613512211 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 (12613512211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261351217 + ... + 1261351226.

It is an arithmetic number, because the mean of its divisors is an integer number (3784053666).

Almost surely, 2^12613512215 is an apocalyptic number.

12613512215 is a deficient number, since it is larger than the sum of its proper divisors (2522702449).

12613512215 is an equidigital number, since it uses as much as digits as its factorization.

12613512215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522702448.

The product of its digits is 3600, while the sum is 29.

The spelling of 12613512215 in words is "twelve billion, six hundred thirteen million, five hundred twelve thousand, two hundred fifteen".