256342255 has 16 divisors (see below), whose sum is σ = 341961984. Its totient is φ = 183191040.

The previous prime is 256342217. The next prime is 256342267. The reversal of 256342255 is 552243652.

It is not a de Polignac number, because 256342255 - 2¹¹ = 256340207 is a prime.

It is a super-2 number, since 2×256342255² = 131422703396970050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256342255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61594 + ... + 65623.

It is an arithmetic number, because the mean of its divisors is an integer number (21372624).

Almost surely, 2^256342255 is an apocalyptic number.

256342255 is a deficient number, since it is larger than the sum of its proper divisors (85619729).

256342255 is a wasteful number, since it uses less digits than its factorization.

256342255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127266.

The product of its digits is 72000, while the sum is 34.

The square root of 256342255 is about 16010.6918963548. The cubic root of 256342255 is about 635.2432614174.

It can be divided in two parts, 25634 and 2255, that added together give a square (27889 = 167²).

The spelling of 256342255 in words is "two hundred fifty-six million, three hundred forty-two thousand, two hundred fifty-five".