256550351 has 2 divisors, whose sum is σ = 256550352. Its totient is φ = 256550350.

The previous prime is 256550347. The next prime is 256550377. The reversal of 256550351 is 153055652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256550351 - 2² = 256550347 is a prime.

It is a Sophie Germain 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 (256550951) 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 as a sum of consecutive naturals, namely, 128275175 + 128275176.

It is an arithmetic number, because the mean of its divisors is an integer number (128275176).

Almost surely, 2^256550351 is an apocalyptic number.

256550351 is a deficient number, since it is larger than the sum of its proper divisors (1).

256550351 is an equidigital number, since it uses as much as digits as its factorization.

256550351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 256550351 is about 16017.1892353184. The cubic root of 256550351 is about 635.4151095679.

The spelling of 256550351 in words is "two hundred fifty-six million, five hundred fifty thousand, three hundred fifty-one".