256216144131 has 6 divisors (see below), whose sum is σ = 370089985980. Its totient is φ = 170810762748.

The previous prime is 256216144091. The next prime is 256216144133. The reversal of 256216144131 is 131441612652.

256216144131 is a `hidden beast` number, since 2 + 5 + 6 + 2 + 1 + 614 + 4 + 1 + 31 = 666.

256216144131 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 256216144131 - 2¹⁵ = 256216111363 is a prime.

It is a super-2 number, since 2×256216144131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256216144133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14234230221 + ... + 14234230238.

It is an arithmetic number, because the mean of its divisors is an integer number (61681664330).

Almost surely, 2^256216144131 is an apocalyptic number.

256216144131 is a deficient number, since it is larger than the sum of its proper divisors (113873841849).

256216144131 is a wasteful number, since it uses less digits than its factorization.

256216144131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28468460465 (or 28468460462 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

Adding to 256216144131 its reverse (131441612652), we get a palindrome (387657756783).

The spelling of 256216144131 in words is "two hundred fifty-six billion, two hundred sixteen million, one hundred forty-four thousand, one hundred thirty-one".