256375543 has 2 divisors, whose sum is σ = 256375544. Its totient is φ = 256375542.

The previous prime is 256375541. The next prime is 256375577. The reversal of 256375543 is 345573652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256375543 - 2¹ = 256375541 is a prime.

Together with 256375541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 256375496 and 256375505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256375541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128187771 + 128187772.

It is an arithmetic number, because the mean of its divisors is an integer number (128187772).

Almost surely, 2^256375543 is an apocalyptic number.

256375543 is a deficient number, since it is larger than the sum of its proper divisors (1).

256375543 is an equidigital number, since it uses as much as digits as its factorization.

256375543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 40.

The square root of 256375543 is about 16011.7314179323. The cubic root of 256375543 is about 635.2707572906.

The spelling of 256375543 in words is "two hundred fifty-six million, three hundred seventy-five thousand, five hundred forty-three".