256023321 has 8 divisors (see below), whose sum is σ = 341439360. Its totient is φ = 170644752.

The previous prime is 256023319. The next prime is 256023329. The reversal of 256023321 is 123320652.

256023321 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 not a de Polignac number, because 256023321 - 2¹ = 256023319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256023291 and 256023300.

It is not an unprimeable number, because it can be changed into a prime (256023329) 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, 18015 + ... + 28923.

It is an arithmetic number, because the mean of its divisors is an integer number (42679920).

Almost surely, 2^256023321 is an apocalyptic number.

It is an amenable number.

256023321 is a deficient number, since it is larger than the sum of its proper divisors (85416039).

256023321 is a wasteful number, since it uses less digits than its factorization.

256023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18735.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 256023321 is about 16000.7287646532. The cubic root of 256023321 is about 634.9797013372.

Adding to 256023321 its reverse (123320652), we get a palindrome (379343973).

The spelling of 256023321 in words is "two hundred fifty-six million, twenty-three thousand, three hundred twenty-one".