256085173 has 8 divisors (see below), whose sum is σ = 269756000. Its totient is φ = 242433648.

The previous prime is 256085171. The next prime is 256085183. The reversal of 256085173 is 371580652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256085173 - 2¹ = 256085171 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 (256085171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28315 + ... + 36247.

It is an arithmetic number, because the mean of its divisors is an integer number (33719500).

Almost surely, 2^256085173 is an apocalyptic number.

It is an amenable number.

256085173 is a deficient number, since it is larger than the sum of its proper divisors (13670827).

256085173 is a wasteful number, since it uses less digits than its factorization.

256085173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9651.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 256085173 is about 16002.6614348989. The cubic root of 256085173 is about 635.0308315780.

The spelling of 256085173 in words is "two hundred fifty-six million, eighty-five thousand, one hundred seventy-three".