256464311 has 2 divisors, whose sum is σ = 256464312. Its totient is φ = 256464310.

The previous prime is 256464301. The next prime is 256464347. The reversal of 256464311 is 113464652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256464311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256464301) 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, 128232155 + 128232156.

It is an arithmetic number, because the mean of its divisors is an integer number (128232156).

Almost surely, 2^256464311 is an apocalyptic number.

256464311 is a deficient number, since it is larger than the sum of its proper divisors (1).

256464311 is an equidigital number, since it uses as much as digits as its factorization.

256464311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 256464311 is about 16014.5031455865. The cubic root of 256464311 is about 635.3440679853.

The spelling of 256464311 in words is "two hundred fifty-six million, four hundred sixty-four thousand, three hundred eleven".