256355975 has 6 divisors (see below), whose sum is σ = 317881440. Its totient is φ = 205084760.

The previous prime is 256355963. The next prime is 256355989. The reversal of 256355975 is 579553652.

It is not a de Polignac number, because 256355975 - 2¹⁶ = 256290439 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 (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5127095 + ... + 5127144.

It is an arithmetic number, because the mean of its divisors is an integer number (52980240).

Almost surely, 2^256355975 is an apocalyptic number.

256355975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256355975 is a deficient number, since it is larger than the sum of its proper divisors (61525465).

256355975 is a wasteful number, since it uses less digits than its factorization.

256355975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10254249 (or 10254244 counting only the distinct ones).

The product of its digits is 1417500, while the sum is 47.

The square root of 256355975 is about 16011.1203543038. The cubic root of 256355975 is about 635.2545944197.

The spelling of 256355975 in words is "two hundred fifty-six million, three hundred fifty-five thousand, nine hundred seventy-five".