256041081 has 24 divisors (see below), whose sum is σ = 386384544. Its totient is φ = 169426080.

The previous prime is 256041053. The next prime is 256041091. The reversal of 256041081 is 180140652.

256041081 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 256041081 - 2²¹ = 253943929 is a prime.

It is a super-2 number, since 2×256041081² = 131114070319297122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (256041011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29446 + ... + 37136.

It is an arithmetic number, because the mean of its divisors is an integer number (16099356).

Almost surely, 2^256041081 is an apocalyptic number.

It is an amenable number.

256041081 is a deficient number, since it is larger than the sum of its proper divisors (130343463).

256041081 is an equidigital number, since it uses as much as digits as its factorization.

256041081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7831 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 256041081 is about 16001.2837297512. The cubic root of 256041081 is about 634.9943835658.

The spelling of 256041081 in words is "two hundred fifty-six million, forty-one thousand, eighty-one".