256512240533 has 2 divisors, whose sum is σ = 256512240534. Its totient is φ = 256512240532.

The previous prime is 256512240527. The next prime is 256512240587. The reversal of 256512240533 is 335042215652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239710118404 + 16802122129 = 489602^2 + 129623^2 .

It is a cyclic number.

It is not a de Polignac number, because 256512240533 - 2¹⁸ = 256511978389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256512540533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128256120266 + 128256120267.

It is an arithmetic number, because the mean of its divisors is an integer number (128256120267).

Almost surely, 2^256512240533 is an apocalyptic number.

It is an amenable number.

256512240533 is a deficient number, since it is larger than the sum of its proper divisors (1).

256512240533 is an equidigital number, since it uses as much as digits as its factorization.

256512240533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 256512240533 in words is "two hundred fifty-six billion, five hundred twelve million, two hundred forty thousand, five hundred thirty-three".