256142343 has 4 divisors (see below), whose sum is σ = 341523128. Its totient is φ = 170761560.

The previous prime is 256142321. The next prime is 256142347. The reversal of 256142343 is 343241652.

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

It is not a de Polignac number, because 256142343 - 2⁵ = 256142311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256142343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256142347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42690388 + ... + 42690393.

It is an arithmetic number, because the mean of its divisors is an integer number (85380782).

Almost surely, 2^256142343 is an apocalyptic number.

256142343 is a deficient number, since it is larger than the sum of its proper divisors (85380785).

256142343 is an equidigital number, since it uses as much as digits as its factorization.

256142343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85380784.

The product of its digits is 17280, while the sum is 30.

The square root of 256142343 is about 16004.4476005890. The cubic root of 256142343 is about 635.0780841007.

Adding to 256142343 its reverse (343241652), we get a palindrome (599383995).

The spelling of 256142343 in words is "two hundred fifty-six million, one hundred forty-two thousand, three hundred forty-three".