256173206 has 16 divisors (see below), whose sum is σ = 390265344. Its totient is φ = 126091584.

The previous prime is 256173199. The next prime is 256173223. The reversal of 256173206 is 602371652.

256173206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256173206² = 131249422944636872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93995 + ... + 96681.

It is an arithmetic number, because the mean of its divisors is an integer number (24391584).

Almost surely, 2^256173206 is an apocalyptic number.

256173206 is a deficient number, since it is larger than the sum of its proper divisors (134092138).

256173206 is a wasteful number, since it uses less digits than its factorization.

256173206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 256173206 is about 16005.4117722725. The cubic root of 256173206 is about 635.1035902672.

The spelling of 256173206 in words is "two hundred fifty-six million, one hundred seventy-three thousand, two hundred six".