256532543 has 2 divisors, whose sum is σ = 256532544. Its totient is φ = 256532542.

The previous prime is 256532537. The next prime is 256532569. The reversal of 256532543 is 345235652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256532543 - 2¹⁴ = 256516159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256532503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128266271 + 128266272.

It is an arithmetic number, because the mean of its divisors is an integer number (128266272).

Almost surely, 2^256532543 is an apocalyptic number.

256532543 is a deficient number, since it is larger than the sum of its proper divisors (1).

256532543 is an equidigital number, since it uses as much as digits as its factorization.

256532543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 35.

The square root of 256532543 is about 16016.6333228928. The cubic root of 256532543 is about 635.4004071465.

The spelling of 256532543 in words is "two hundred fifty-six million, five hundred thirty-two thousand, five hundred forty-three".