256285207 has 4 divisors (see below), whose sum is σ = 257197536. Its totient is φ = 255372880.

The previous prime is 256285181. The next prime is 256285229. The reversal of 256285207 is 702582652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256285207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256285507) 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, 455743 + ... + 456304.

It is an arithmetic number, because the mean of its divisors is an integer number (64299384).

Almost surely, 2^256285207 is an apocalyptic number.

256285207 is a deficient number, since it is larger than the sum of its proper divisors (912329).

256285207 is an equidigital number, since it uses as much as digits as its factorization.

256285207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912328.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 256285207 is about 16008.9102377395. The cubic root of 256285207 is about 635.1961342589.

The spelling of 256285207 in words is "two hundred fifty-six million, two hundred eighty-five thousand, two hundred seven".