13256012305 has 16 divisors (see below), whose sum is σ = 16362581760. Its totient is φ = 10304479872.

The previous prime is 13256012281. The next prime is 13256012309. The reversal of 13256012305 is 50321065231.

It is a cyclic number.

It is not a de Polignac number, because 13256012305 - 2⁷ = 13256012177 is a prime.

It is a super-2 number, since 2×13256012305² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13256012309) 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, 170244 + ... + 235573.

It is an arithmetic number, because the mean of its divisors is an integer number (1022661360).

Almost surely, 2^13256012305 is an apocalyptic number.

It is an amenable number.

13256012305 is a deficient number, since it is larger than the sum of its proper divisors (3106569455).

13256012305 is a wasteful number, since it uses less digits than its factorization.

13256012305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406008.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 13256012305 its reverse (50321065231), we get a palindrome (63577077536).

The spelling of 13256012305 in words is "thirteen billion, two hundred fifty-six million, twelve thousand, three hundred five".