256341813 has 16 divisors (see below), whose sum is σ = 420663936. Its totient is φ = 135213120.

The previous prime is 256341797. The next prime is 256341829. The reversal of 256341813 is 318143652.

It is an interprime number because it is at equal distance from previous prime (256341797) and next prime (256341829).

It is not a de Polignac number, because 256341813 - 2⁴ = 256341797 is a prime.

It is a super-2 number, since 2×256341813² = 131422250184253938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256341853) 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, 469218 + ... + 469763.

It is an arithmetic number, because the mean of its divisors is an integer number (26291496).

Almost surely, 2^256341813 is an apocalyptic number.

It is an amenable number.

256341813 is a deficient number, since it is larger than the sum of its proper divisors (164322123).

256341813 is a wasteful number, since it uses less digits than its factorization.

256341813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939004.

The product of its digits is 17280, while the sum is 33.

The square root of 256341813 is about 16010.6780930728. The cubic root of 256341813 is about 635.2428963096.

The spelling of 256341813 in words is "two hundred fifty-six million, three hundred forty-one thousand, eight hundred thirteen".