256512885 has 16 divisors (see below), whose sum is σ = 411512640. Its totient is φ = 136442880.

The previous prime is 256512877. The next prime is 256512889. The reversal of 256512885 is 588215652.

It is not a de Polignac number, because 256512885 - 2³ = 256512877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256512889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16876 + ... + 28245.

It is an arithmetic number, because the mean of its divisors is an integer number (25719540).

Almost surely, 2^256512885 is an apocalyptic number.

It is an amenable number.

256512885 is a deficient number, since it is larger than the sum of its proper divisors (154999755).

256512885 is a wasteful number, since it uses less digits than its factorization.

256512885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45508.

The product of its digits is 192000, while the sum is 42.

The square root of 256512885 is about 16016.0196366013. The cubic root of 256512885 is about 635.3841765608.

The spelling of 256512885 in words is "two hundred fifty-six million, five hundred twelve thousand, eight hundred eighty-five".