256424011 has 2 divisors, whose sum is σ = 256424012. Its totient is φ = 256424010.

The previous prime is 256423997. The next prime is 256424087. The reversal of 256424011 is 110424652.

It is a happy number.

256424011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256424011 - 2⁷ = 256423883 is a prime.

It is not a weakly prime, because it can be changed into another prime (256424111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128212005 + 128212006.

It is an arithmetic number, because the mean of its divisors is an integer number (128212006).

Almost surely, 2^256424011 is an apocalyptic number.

256424011 is a deficient number, since it is larger than the sum of its proper divisors (1).

256424011 is an equidigital number, since it uses as much as digits as its factorization.

256424011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 256424011 is about 16013.2448616762. The cubic root of 256424011 is about 635.3107875819.

Adding to 256424011 its reverse (110424652), we get a palindrome (366848663).

The spelling of 256424011 in words is "two hundred fifty-six million, four hundred twenty-four thousand, eleven".