256559316 has 24 divisors (see below), whose sum is σ = 644687904. Its totient is φ = 78941280.

The previous prime is 256559311. The next prime is 256559327. The reversal of 256559316 is 613955652.

256559316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256559311) 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, 822150 + ... + 822461.

It is an arithmetic number, because the mean of its divisors is an integer number (26861996).

Almost surely, 2^256559316 is an apocalyptic number.

256559316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

256559316 is an abundant number, since it is smaller than the sum of its proper divisors (388128588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256559316 is a wasteful number, since it uses less digits than its factorization.

256559316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644631 (or 1644629 counting only the distinct ones).

The product of its digits is 243000, while the sum is 42.

The square root of 256559316 is about 16017.4690884671. The cubic root of 256559316 is about 635.4225108832.

The spelling of 256559316 in words is "two hundred fifty-six million, five hundred fifty-nine thousand, three hundred sixteen".