256843157 has 8 divisors (see below), whose sum is σ = 272160000. Its totient is φ = 241549504.

The previous prime is 256843133. The next prime is 256843177. The reversal of 256843157 is 751348652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256843157 - 2¹⁶ = 256777621 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 (256843117) 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 7 ways as a sum of consecutive naturals, for example, 20444 + ... + 30522.

It is an arithmetic number, because the mean of its divisors is an integer number (34020000).

Almost surely, 2^256843157 is an apocalyptic number.

It is an amenable number.

256843157 is a deficient number, since it is larger than the sum of its proper divisors (15316843).

256843157 is a wasteful number, since it uses less digits than its factorization.

256843157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11595.

The product of its digits is 201600, while the sum is 41.

The square root of 256843157 is about 16026.3269965392. The cubic root of 256843157 is about 635.6567549455.

The spelling of 256843157 in words is "two hundred fifty-six million, eight hundred forty-three thousand, one hundred fifty-seven".