256106256 has 80 divisors (see below), whose sum is σ = 768998400. Its totient is φ = 71927424.

The previous prime is 256106231. The next prime is 256106281. The reversal of 256106256 is 652601652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256106231) and next prime (256106281).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13365 + ... + 26283.

It is an arithmetic number, because the mean of its divisors is an integer number (9612480).

Almost surely, 2^256106256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256106256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384499200).

256106256 is an abundant number, since it is smaller than the sum of its proper divisors (512892144).

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

256106256 is a wasteful number, since it uses less digits than its factorization.

256106256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12996 (or 12990 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 256106256 is about 16003.3201555177. The cubic root of 256106256 is about 635.0482580556.

The spelling of 256106256 in words is "two hundred fifty-six million, one hundred six thousand, two hundred fifty-six".