256225650 has 48 divisors (see below), whose sum is σ = 640063200. Its totient is φ = 67829760.

The previous prime is 256225609. The next prime is 256225661. The reversal of 256225650 is 56522652.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14706 + ... + 26994.

It is an arithmetic number, because the mean of its divisors is an integer number (13334650).

Almost surely, 2^256225650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256225650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320031600).

256225650 is an abundant number, since it is smaller than the sum of its proper divisors (383837550).

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

256225650 is a wasteful number, since it uses less digits than its factorization.

256225650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12443 (or 12438 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 256225650 is about 16007.0500092928. The cubic root of 256225650 is about 635.1469269619.

The spelling of 256225650 in words is "two hundred fifty-six million, two hundred twenty-five thousand, six hundred fifty".