13256354331 has 24 divisors (see below), whose sum is σ = 20950838064. Its totient is φ = 8010293760.

The previous prime is 13256354327. The next prime is 13256354357. The reversal of 13256354331 is 13345365231.

13256354331 is a `hidden beast` number, since 1 + 3 + 25 + 63 + 543 + 31 = 666.

13256354331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13256354331 - 2² = 13256354327 is a prime.

It is a super-5 number, since 5×13256354331⁵ (a number of 52 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (13256354381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165306 + ... + 232031.

It is an arithmetic number, because the mean of its divisors is an integer number (872951586).

Almost surely, 2^13256354331 is an apocalyptic number.

13256354331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13256354331 is a deficient number, since it is larger than the sum of its proper divisors (7694483733).

13256354331 is a wasteful number, since it uses less digits than its factorization.

13256354331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397691 (or 397688 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The spelling of 13256354331 in words is "thirteen billion, two hundred fifty-six million, three hundred fifty-four thousand, three hundred thirty-one".