256851341 has 4 divisors (see below), whose sum is σ = 262824672. Its totient is φ = 250878012.

The previous prime is 256851319. The next prime is 256851359. The reversal of 256851341 is 143158652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256851341 - 2¹⁰ = 256850317 is a prime.

It is a super-2 number, since 2×256851341² = 131945222746996562, 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 (256851391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2986601 + ... + 2986686.

It is an arithmetic number, because the mean of its divisors is an integer number (65706168).

Almost surely, 2^256851341 is an apocalyptic number.

It is an amenable number.

256851341 is a deficient number, since it is larger than the sum of its proper divisors (5973331).

256851341 is an equidigital number, since it uses as much as digits as its factorization.

256851341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5973330.

The product of its digits is 28800, while the sum is 35.

The square root of 256851341 is about 16026.5823243760. The cubic root of 256851341 is about 635.6635063545.

The spelling of 256851341 in words is "two hundred fifty-six million, eight hundred fifty-one thousand, three hundred forty-one".