13256565144231 has 4 divisors (see below), whose sum is σ = 17675420192312. Its totient is φ = 8837710096152.

The previous prime is 13256565144217. The next prime is 13256565144233. The reversal of 13256565144231 is 13244156565231.

It is a happy number.

13256565144231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13256565144231 - 2¹⁹ = 13256564619943 is a prime.

It is a super-2 number, since 2×13256565144231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13256565144233) 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, 2209427524036 + ... + 2209427524041.

It is an arithmetic number, because the mean of its divisors is an integer number (4418855048078).

Almost surely, 2^{13256565144231} is an apocalyptic number.

13256565144231 is a deficient number, since it is larger than the sum of its proper divisors (4418855048081).

13256565144231 is an equidigital number, since it uses as much as digits as its factorization.

13256565144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418855048080.

The product of its digits is 2592000, while the sum is 48.

The spelling of 13256565144231 in words is "thirteen trillion, two hundred fifty-six billion, five hundred sixty-five million, one hundred forty-four thousand, two hundred thirty-one".