256318 has 4 divisors (see below), whose sum is σ = 384480. Its totient is φ = 128158.

The previous prime is 256313. The next prime is 256337. The reversal of 256318 is 813652.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 256292 and 256301.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 64078 + ... + 64081.

It is an arithmetic number, because the mean of its divisors is an integer number (96120).

2²⁵⁶³¹⁸ is an apocalyptic number.

256318 is a deficient number, since it is larger than the sum of its proper divisors (128162).

256318 is a wasteful number, since it uses less digits than its factorization.

256318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128161.

The product of its digits is 1440, while the sum is 25.

The square root of 256318 is about 506.2785794402. The cubic root of 256318 is about 63.5223225299.

The spelling of 256318 in words is "two hundred fifty-six thousand, three hundred eighteen".