256323 has 8 divisors (see below), whose sum is σ = 349888. Its totient is φ = 166824.

The previous prime is 256313. The next prime is 256337. The reversal of 256323 is 323652.

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

It is not a de Polignac number, because 256323 - 2⁴ = 256307 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 256323.

It is not an unprimeable number, because it can be changed into a prime (256313) 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, 865 + ... + 1122.

It is an arithmetic number, because the mean of its divisors is an integer number (43736).

2²⁵⁶³²³ is an apocalyptic number.

256323 is a deficient number, since it is larger than the sum of its proper divisors (93565).

256323 is a wasteful number, since it uses less digits than its factorization.

256323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033.

The product of its digits is 1080, while the sum is 21.

The square root of 256323 is about 506.2835174090. The cubic root of 256323 is about 63.5227355709.

Adding to 256323 its product of digits (1080), we get a triangular number (257403 = T₇₁₇).

Adding to 256323 its reverse (323652), we get a palindrome (579975).

The spelling of 256323 in words is "two hundred fifty-six thousand, three hundred twenty-three".