256089543 has 32 divisors (see below), whose sum is σ = 381143040. Its totient is φ = 152254080.

The previous prime is 256089499. The next prime is 256089551. The reversal of 256089543 is 345980652.

It is not a de Polignac number, because 256089543 - 2¹⁶ = 256024007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256089495 and 256089504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256089563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63421 + ... + 67337.

It is an arithmetic number, because the mean of its divisors is an integer number (11910720).

Almost surely, 2^256089543 is an apocalyptic number.

256089543 is a deficient number, since it is larger than the sum of its proper divisors (125053497).

256089543 is a wasteful number, since it uses less digits than its factorization.

256089543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 256089543 is about 16002.7979741044. The cubic root of 256089543 is about 635.0344437472.

The spelling of 256089543 in words is "two hundred fifty-six million, eighty-nine thousand, five hundred forty-three".