256204317 has 16 divisors (see below), whose sum is σ = 355078080. Its totient is φ = 164178432.

The previous prime is 256204313. The next prime is 256204387. The reversal of 256204317 is 713402652.

It is not a de Polignac number, because 256204317 - 2² = 256204313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256204313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4692 + ... + 23117.

It is an arithmetic number, because the mean of its divisors is an integer number (22192380).

Almost surely, 2^256204317 is an apocalyptic number.

It is an amenable number.

256204317 is a deficient number, since it is larger than the sum of its proper divisors (98873763).

256204317 is a wasteful number, since it uses less digits than its factorization.

256204317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27932.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 256204317 is about 16006.3836327885. The cubic root of 256204317 is about 635.1292993155.

Adding to 256204317 its reverse (713402652), we get a palindrome (969606969).

The spelling of 256204317 in words is "two hundred fifty-six million, two hundred four thousand, three hundred seventeen".