256056501 has 8 divisors (see below), whose sum is σ = 341732320. Its totient is φ = 170542512.

The previous prime is 256056491. The next prime is 256056523. The reversal of 256056501 is 105650652.

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

It is not a de Polignac number, because 256056501 - 2²⁶ = 188947637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256056551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36715 + ... + 43128.

It is an arithmetic number, because the mean of its divisors is an integer number (42716540).

Almost surely, 2^256056501 is an apocalyptic number.

It is an amenable number.

256056501 is a deficient number, since it is larger than the sum of its proper divisors (85675819).

256056501 is a wasteful number, since it uses less digits than its factorization.

256056501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80915.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 256056501 is about 16001.7655588376. The cubic root of 256056501 is about 635.0071307609.

The spelling of 256056501 in words is "two hundred fifty-six million, fifty-six thousand, five hundred one".