13256143242 has 32 divisors (see below), whose sum is σ = 27675077760. Its totient is φ = 4225056000.

The previous prime is 13256143171. The next prime is 13256143249. The reversal of 13256143242 is 24234165231.

It is not an unprimeable number, because it can be changed into a prime (13256143249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398134 + ... + 430142.

It is an arithmetic number, because the mean of its divisors is an integer number (864846180).

Almost surely, 2^13256143242 is an apocalyptic number.

13256143242 is an abundant number, since it is smaller than the sum of its proper divisors (14418934518).

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

13256143242 is a wasteful number, since it uses less digits than its factorization.

13256143242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35038.

The product of its digits is 34560, while the sum is 33.

The spelling of 13256143242 in words is "thirteen billion, two hundred fifty-six million, one hundred forty-three thousand, two hundred forty-two".