256312455 has 16 divisors (see below), whose sum is σ = 468685824. Its totient is φ = 117171360.

The previous prime is 256312429. The next prime is 256312477. The reversal of 256312455 is 554213652.

It is not a de Polignac number, because 256312455 - 2⁷ = 256312327 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1220431 + ... + 1220640.

It is an arithmetic number, because the mean of its divisors is an integer number (29292864).

Almost surely, 2^256312455 is an apocalyptic number.

256312455 is a deficient number, since it is larger than the sum of its proper divisors (212373369).

256312455 is a wasteful number, since it uses less digits than its factorization.

256312455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441086.

The product of its digits is 36000, while the sum is 33.

The square root of 256312455 is about 16009.7612411928. The cubic root of 256312455 is about 635.2186446113.

The spelling of 256312455 in words is "two hundred fifty-six million, three hundred twelve thousand, four hundred fifty-five".