256159975 has 24 divisors (see below), whose sum is σ = 329121792. Its totient is φ = 197570400.

The previous prime is 256159973. The next prime is 256159999. The reversal of 256159975 is 579951652.

It is not a de Polignac number, because 256159975 - 2¹ = 256159973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256159973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296394 + ... + 297256.

It is an arithmetic number, because the mean of its divisors is an integer number (13713408).

Almost surely, 2^256159975 is an apocalyptic number.

256159975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256159975 is a deficient number, since it is larger than the sum of its proper divisors (72961817).

256159975 is a wasteful number, since it uses less digits than its factorization.

256159975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1282 counting only the distinct ones).

The product of its digits is 850500, while the sum is 49.

The square root of 256159975 is about 16004.9984379881. The cubic root of 256159975 is about 635.0926559981.

The spelling of 256159975 in words is "two hundred fifty-six million, one hundred fifty-nine thousand, nine hundred seventy-five".