256222266 has 16 divisors (see below), whose sum is σ = 542588544. Its totient is φ = 80383424.

The previous prime is 256222229. The next prime is 256222297. The reversal of 256222266 is 662222652.

256222266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255890 + ... + 1256093.

It is an arithmetic number, because the mean of its divisors is an integer number (33911784).

Almost surely, 2^256222266 is an apocalyptic number.

256222266 is an abundant number, since it is smaller than the sum of its proper divisors (286366278).

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

256222266 is a wasteful number, since it uses less digits than its factorization.

256222266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512005.

The product of its digits is 34560, while the sum is 33.

The square root of 256222266 is about 16006.9443055194. The cubic root of 256222266 is about 635.1441307981.

The spelling of 256222266 in words is "two hundred fifty-six million, two hundred twenty-two thousand, two hundred sixty-six".