13043505312 has 72 divisors (see below), whose sum is σ = 37110498516. Its totient is φ = 4345721856.

The previous prime is 13043505311. The next prime is 13043505341. The reversal of 13043505312 is 21350534031.

13043505312 is a `hidden beast` number, since 1 + 304 + 350 + 5 + 3 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12037600656 + 1005904656 = 109716^2 + 31716^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (13043505311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651678 + ... + 671394.

Almost surely, 2^13043505312 is an apocalyptic number.

13043505312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13043505312 is an abundant number, since it is smaller than the sum of its proper divisors (24066993204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13043505312 is a wasteful number, since it uses less digits than its factorization.

13043505312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22030 (or 22019 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 13043505312 in words is "thirteen billion, forty-three million, five hundred five thousand, three hundred twelve".