256003165 has 8 divisors (see below), whose sum is σ = 335131488. Its totient is φ = 186184080.

The previous prime is 256003159. The next prime is 256003193. The reversal of 256003165 is 561300652.

256003165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 256003165 - 2⁹ = 256002653 is a prime.

It is a super-3 number, since 3×256003165³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

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, 2327247 + ... + 2327356.

It is an arithmetic number, because the mean of its divisors is an integer number (41891436).

Almost surely, 2^256003165 is an apocalyptic number.

It is an amenable number.

256003165 is a deficient number, since it is larger than the sum of its proper divisors (79128323).

256003165 is a wasteful number, since it uses less digits than its factorization.

256003165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654619.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 256003165 is about 16000.0989059443. The cubic root of 256003165 is about 634.9630375079.

The spelling of 256003165 in words is "two hundred fifty-six million, three thousand, one hundred sixty-five".