256533061 has 2 divisors, whose sum is σ = 256533062. Its totient is φ = 256533060.

The previous prime is 256533037. The next prime is 256533071. The reversal of 256533061 is 160335652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230584225 + 25948836 = 15185^2 + 5094^2 .

It is a cyclic number.

It is not a de Polignac number, because 256533061 - 2¹³ = 256524869 is a prime.

It is a super-2 number, since 2×256533061² = 131618422772059442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256533001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128266530 + 128266531.

It is an arithmetic number, because the mean of its divisors is an integer number (128266531).

Almost surely, 2^256533061 is an apocalyptic number.

It is an amenable number.

256533061 is a deficient number, since it is larger than the sum of its proper divisors (1).

256533061 is an equidigital number, since it uses as much as digits as its factorization.

256533061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 256533061 is about 16016.6494935739. The cubic root of 256533061 is about 635.4008348209.

The spelling of 256533061 in words is "two hundred fifty-six million, five hundred thirty-three thousand, sixty-one".