256682351 has 4 divisors (see below), whose sum is σ = 262651752. Its totient is φ = 250712952.

The previous prime is 256682341. The next prime is 256682359. The reversal of 256682351 is 153286652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256682351 - 2¹⁸ = 256420207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256682359) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2984636 + ... + 2984721.

It is an arithmetic number, because the mean of its divisors is an integer number (65662938).

Almost surely, 2^256682351 is an apocalyptic number.

256682351 is a deficient number, since it is larger than the sum of its proper divisors (5969401).

256682351 is an equidigital number, since it uses as much as digits as its factorization.

256682351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969400.

The product of its digits is 86400, while the sum is 38.

The square root of 256682351 is about 16021.3092785827. The cubic root of 256682351 is about 635.5240685737.

The spelling of 256682351 in words is "two hundred fifty-six million, six hundred eighty-two thousand, three hundred fifty-one".