256422352143 has 4 divisors (see below), whose sum is σ = 341896469528. Its totient is φ = 170948234760.

The previous prime is 256422352079. The next prime is 256422352157. The reversal of 256422352143 is 341253224652.

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

It is not a de Polignac number, because 256422352143 - 2⁶ = 256422352079 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 (256422352163) 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, 42737058688 + ... + 42737058693.

It is an arithmetic number, because the mean of its divisors is an integer number (85474117382).

Almost surely, 2^256422352143 is an apocalyptic number.

256422352143 is a deficient number, since it is larger than the sum of its proper divisors (85474117385).

256422352143 is an equidigital number, since it uses as much as digits as its factorization.

256422352143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85474117384.

The product of its digits is 345600, while the sum is 39.

Adding to 256422352143 its reverse (341253224652), we get a palindrome (597675576795).

The spelling of 256422352143 in words is "two hundred fifty-six billion, four hundred twenty-two million, three hundred fifty-two thousand, one hundred forty-three".