256056081 has 8 divisors (see below), whose sum is σ = 341514624. Its totient is φ = 170650800.

The previous prime is 256056061. The next prime is 256056107. The reversal of 256056081 is 180650652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256056081 - 2¹⁰ = 256055057 is a prime.

It is a super-2 number, since 2×256056081² = 131129433234157122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256056061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (42689328).

Almost surely, 2^256056081 is an apocalyptic number.

It is an amenable number.

256056081 is a deficient number, since it is larger than the sum of its proper divisors (85458543).

256056081 is a wasteful number, since it uses less digits than its factorization.

256056081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26631.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 256056081 is about 16001.7524352803. The cubic root of 256056081 is about 635.0067835678.

The spelling of 256056081 in words is "two hundred fifty-six million, fifty-six thousand, eighty-one".