256523223 has 8 divisors (see below), whose sum is σ = 373124736. Its totient is φ = 155468600.

The previous prime is 256523177. The next prime is 256523231. The reversal of 256523223 is 322325652.

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 256523223 - 2⁶ = 256523159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256523263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3886683 + ... + 3886748.

It is an arithmetic number, because the mean of its divisors is an integer number (46640592).

Almost surely, 2^256523223 is an apocalyptic number.

256523223 is a deficient number, since it is larger than the sum of its proper divisors (116601513).

256523223 is a wasteful number, since it uses less digits than its factorization.

256523223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773445.

The product of its digits is 21600, while the sum is 30.

The square root of 256523223 is about 16016.3423727142. The cubic root of 256523223 is about 635.3927122118.

Adding to 256523223 its reverse (322325652), we get a palindrome (578848875).

The spelling of 256523223 in words is "two hundred fifty-six million, five hundred twenty-three thousand, two hundred twenty-three".