256882751 has 4 divisors (see below), whose sum is σ = 257583072. Its totient is φ = 256182432.

The previous prime is 256882741. The next prime is 256882781. The reversal of 256882751 is 157288652.

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 256882751 - 2¹⁰ = 256881727 is a prime.

It is a super-2 number, since 2×256882751² = 131977495522656002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256882741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349610 + ... + 350343.

It is an arithmetic number, because the mean of its divisors is an integer number (64395768).

Almost surely, 2^256882751 is an apocalyptic number.

256882751 is a deficient number, since it is larger than the sum of its proper divisors (700321).

256882751 is an equidigital number, since it uses as much as digits as its factorization.

256882751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700320.

The product of its digits is 268800, while the sum is 44.

The square root of 256882751 is about 16027.5622288606. The cubic root of 256882751 is about 635.6894167726.

The spelling of 256882751 in words is "two hundred fifty-six million, eight hundred eighty-two thousand, seven hundred fifty-one".