256512007 has 2 divisors, whose sum is σ = 256512008. Its totient is φ = 256512006.

The previous prime is 256511987. The next prime is 256512013. The reversal of 256512007 is 700215652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256512007 - 2¹⁵ = 256479239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256512037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128256003 + 128256004.

It is an arithmetic number, because the mean of its divisors is an integer number (128256004).

Almost surely, 2^256512007 is an apocalyptic number.

256512007 is a deficient number, since it is larger than the sum of its proper divisors (1).

256512007 is an equidigital number, since it uses as much as digits as its factorization.

256512007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 256512007 is about 16015.9922265216. The cubic root of 256512007 is about 635.3834516227.

Adding to 256512007 its reverse (700215652), we get a palindrome (956727659).

The spelling of 256512007 in words is "two hundred fifty-six million, five hundred twelve thousand, seven".