256222222651 has 8 divisors (see below), whose sum is σ = 268480995840. Its totient is φ = 244056672552.

The previous prime is 256222222621. The next prime is 256222222657. The reversal of 256222222651 is 156222222652.

256222222651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 256222222651 - 2²⁷ = 256088004923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256222222651.

It is not an unprimeable number, because it can be changed into a prime (256222222657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23300145 + ... + 23311138.

It is an arithmetic number, because the mean of its divisors is an integer number (33560124480).

Almost surely, 2^256222222651 is an apocalyptic number.

256222222651 is a deficient number, since it is larger than the sum of its proper divisors (12258773189).

256222222651 is a wasteful number, since it uses less digits than its factorization.

256222222651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46611545.

The product of its digits is 115200, while the sum is 37.

Subtracting from 256222222651 its reverse (156222222652), we obtain a palindrome (99999999999).

The spelling of 256222222651 in words is "two hundred fifty-six billion, two hundred twenty-two million, two hundred twenty-two thousand, six hundred fifty-one".