256003065 has 32 divisors (see below), whose sum is σ = 462844800. Its totient is φ = 134216640.

The previous prime is 256003021. The next prime is 256003117. The reversal of 256003065 is 560300652.

256003065 is a `hidden beast` number, since 25 + 600 + 30 + 6 + 5 = 666.

It is not a de Polignac number, because 256003065 - 2⁶ = 256003001 is a prime.

It is a super-3 number, since 3×256003065³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8106 + ... + 24035.

It is an arithmetic number, because the mean of its divisors is an integer number (14463900).

Almost surely, 2^256003065 is an apocalyptic number.

It is an amenable number.

256003065 is a deficient number, since it is larger than the sum of its proper divisors (206841735).

256003065 is a wasteful number, since it uses less digits than its factorization.

256003065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32214 (or 32208 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 256003065 is about 16000.0957809633. The cubic root of 256003065 is about 634.9629548315.

The spelling of 256003065 in words is "two hundred fifty-six million, three thousand, sixty-five".