256357211223 has 4 divisors (see below), whose sum is σ = 341809614968. Its totient is φ = 170904807480.

The previous prime is 256357211177. The next prime is 256357211251. The reversal of 256357211223 is 322112753652.

256357211223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 256357211223 - 2¹³ = 256357203031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256357211623) 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 3 ways as a sum of consecutive naturals, for example, 42726201868 + ... + 42726201873.

It is an arithmetic number, because the mean of its divisors is an integer number (85452403742).

Almost surely, 2^256357211223 is an apocalyptic number.

256357211223 is a deficient number, since it is larger than the sum of its proper divisors (85452403745).

256357211223 is an equidigital number, since it uses as much as digits as its factorization.

256357211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85452403744.

The product of its digits is 151200, while the sum is 39.

Adding to 256357211223 its reverse (322112753652), we get a palindrome (578469964875).

The spelling of 256357211223 in words is "two hundred fifty-six billion, three hundred fifty-seven million, two hundred eleven thousand, two hundred twenty-three".