256624111 has 2 divisors, whose sum is σ = 256624112. Its totient is φ = 256624110.

The previous prime is 256624079. The next prime is 256624177. The reversal of 256624111 is 111426652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256624111 - 2⁵ = 256624079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256624111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256624211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128312055 + 128312056.

It is an arithmetic number, because the mean of its divisors is an integer number (128312056).

Almost surely, 2^256624111 is an apocalyptic number.

256624111 is a deficient number, since it is larger than the sum of its proper divisors (1).

256624111 is an equidigital number, since it uses as much as digits as its factorization.

256624111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 256624111 is about 16019.4915961775. The cubic root of 256624111 is about 635.4759991456.

The spelling of 256624111 in words is "two hundred fifty-six million, six hundred twenty-four thousand, one hundred eleven".