256716575 has 24 divisors (see below), whose sum is σ = 339165792. Its totient is φ = 192081920.

The previous prime is 256716571. The next prime is 256716589. The reversal of 256716575 is 575617652.

It is not a de Polignac number, because 256716575 - 2² = 256716571 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256716571) 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, 69167 + ... + 72783.

It is an arithmetic number, because the mean of its divisors is an integer number (14131908).

Almost surely, 2^256716575 is an apocalyptic number.

256716575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256716575 is a deficient number, since it is larger than the sum of its proper divisors (82449217).

256716575 is a wasteful number, since it uses less digits than its factorization.

256716575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811 (or 3806 counting only the distinct ones).

The product of its digits is 441000, while the sum is 44.

The square root of 256716575 is about 16022.3773204852. The cubic root of 256716575 is about 635.5523125739.

The spelling of 256716575 in words is "two hundred fifty-six million, seven hundred sixteen thousand, five hundred seventy-five".