256016417 has 4 divisors (see below), whose sum is σ = 256059540. Its totient is φ = 255973296.

The previous prime is 256016401. The next prime is 256016443. The reversal of 256016417 is 714610652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71301136 + 184715281 = 8444^2 + 13591^2 .

It is a cyclic number.

It is not a de Polignac number, because 256016417 - 2⁴ = 256016401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256016017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10898 + ... + 25115.

It is an arithmetic number, because the mean of its divisors is an integer number (64014885).

Almost surely, 2^256016417 is an apocalyptic number.

It is an amenable number.

256016417 is a deficient number, since it is larger than the sum of its proper divisors (43123).

256016417 is an equidigital number, since it uses as much as digits as its factorization.

256016417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43122.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 256016417 is about 16000.5130230252. The cubic root of 256016417 is about 634.9739936029.

The spelling of 256016417 in words is "two hundred fifty-six million, sixteen thousand, four hundred seventeen".