256055065331 has 16 divisors (see below), whose sum is σ = 281650049184. Its totient is φ = 231347660544.

The previous prime is 256055065313. The next prime is 256055065349. The reversal of 256055065331 is 133560550652.

It is an interprime number because it is at equal distance from previous prime (256055065313) and next prime (256055065349).

It is not a de Polignac number, because 256055065331 - 2⁶ = 256055065267 is a prime.

It is a super-2 number, since 2×256055065331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256055065531) 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, 799490 + ... + 1072983.

It is an arithmetic number, because the mean of its divisors is an integer number (17603128074).

Almost surely, 2^256055065331 is an apocalyptic number.

256055065331 is a deficient number, since it is larger than the sum of its proper divisors (25594983853).

256055065331 is a wasteful number, since it uses less digits than its factorization.

256055065331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872710.

The product of its (nonzero) digits is 405000, while the sum is 41.

The spelling of 256055065331 in words is "two hundred fifty-six billion, fifty-five million, sixty-five thousand, three hundred thirty-one".