256091343 has 8 divisors (see below), whose sum is σ = 341696256. Its totient is φ = 170607000.

The previous prime is 256091323. The next prime is 256091347. The reversal of 256091343 is 343190652.

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

It is not a de Polignac number, because 256091343 - 2¹⁰ = 256090319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256091347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25063 + ... + 33768.

It is an arithmetic number, because the mean of its divisors is an integer number (42712032).

Almost surely, 2^256091343 is an apocalyptic number.

256091343 is a deficient number, since it is larger than the sum of its proper divisors (85604913).

256091343 is a wasteful number, since it uses less digits than its factorization.

256091343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60285.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 256091343 is about 16002.8542141707. The cubic root of 256091343 is about 635.0359315853.

The spelling of 256091343 in words is "two hundred fifty-six million, ninety-one thousand, three hundred forty-three".