256002003 has 24 divisors (see below), whose sum is σ = 380343600. Its totient is φ = 165859584.

The previous prime is 256001987. The next prime is 256002013. The reversal of 256002003 is 300200652.

It is not a de Polignac number, because 256002003 - 2⁴ = 256001987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256002013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44551 + ... + 49967.

It is an arithmetic number, because the mean of its divisors is an integer number (15847650).

Almost surely, 2^256002003 is an apocalyptic number.

256002003 is a deficient number, since it is larger than the sum of its proper divisors (124341597).

256002003 is a wasteful number, since it uses less digits than its factorization.

256002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571 (or 5568 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 256002003 is about 16000.0625936276. The cubic root of 256002003 is about 634.9620768060.

Adding to 256002003 its reverse (300200652), we get a palindrome (556202655).

The spelling of 256002003 in words is "two hundred fifty-six million, two thousand, three".