256212266 has 8 divisors (see below), whose sum is σ = 385850304. Its totient is φ = 127595500.

The previous prime is 256212263. The next prime is 256212277. The reversal of 256212266 is 662212652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256212263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254690 + ... + 255693.

It is an arithmetic number, because the mean of its divisors is an integer number (48231288).

Almost surely, 2^256212266 is an apocalyptic number.

256212266 is a deficient number, since it is larger than the sum of its proper divisors (129638038).

256212266 is a wasteful number, since it uses less digits than its factorization.

256212266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510636.

The product of its digits is 17280, while the sum is 32.

The square root of 256212266 is about 16006.6319380437. The cubic root of 256212266 is about 635.1358677588.

The spelling of 256212266 in words is "two hundred fifty-six million, two hundred twelve thousand, two hundred sixty-six".