256544023 has 8 divisors (see below), whose sum is σ = 270714800. Its totient is φ = 242440128.

The previous prime is 256544021. The next prime is 256544027. The reversal of 256544023 is 320445652.

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 256544023 - 2¹ = 256544021 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 (256544021) 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, 8736 + ... + 24277.

It is an arithmetic number, because the mean of its divisors is an integer number (33839350).

Almost surely, 2^256544023 is an apocalyptic number.

256544023 is a deficient number, since it is larger than the sum of its proper divisors (14170777).

256544023 is a wasteful number, since it uses less digits than its factorization.

256544023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33441.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 256544023 is about 16016.9916963205. The cubic root of 256544023 is about 635.4098852005.

Adding to 256544023 its reverse (320445652), we get a palindrome (576989675).

The spelling of 256544023 in words is "two hundred fifty-six million, five hundred forty-four thousand, twenty-three".