256100556 has 24 divisors (see below), whose sum is σ = 610283520. Its totient is φ = 83550352.

The previous prime is 256100543. The next prime is 256100557. The reversal of 256100556 is 655001652.

256100556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256100557) 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, 226476 + ... + 227603.

It is an arithmetic number, because the mean of its divisors is an integer number (25428480).

Almost surely, 2^256100556 is an apocalyptic number.

It is an amenable number.

256100556 is an abundant number, since it is smaller than the sum of its proper divisors (354182964).

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

256100556 is a wasteful number, since it uses less digits than its factorization.

256100556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454133 (or 454131 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 256100556 is about 16003.1420664818. The cubic root of 256100556 is about 635.0435467274.

The spelling of 256100556 in words is "two hundred fifty-six million, one hundred thousand, five hundred fifty-six".