256321324 has 24 divisors (see below), whose sum is σ = 539624960. Its totient is φ = 104070096.

The previous prime is 256321309. The next prime is 256321327. The reversal of 256321324 is 423123652.

It is a super-2 number, since 2×256321324² = 131401242274225952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 256321292 and 256321301.

It is not an unprimeable number, because it can be changed into a prime (256321327) 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, 240372 + ... + 241435.

Almost surely, 2^256321324 is an apocalyptic number.

It is an amenable number.

256321324 is an abundant number, since it is smaller than the sum of its proper divisors (283303636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256321324 is a wasteful number, since it uses less digits than its factorization.

256321324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481837 (or 481835 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 256321324 is about 16010.0382260630. The cubic root of 256321324 is about 635.2259712017.

Adding to 256321324 its reverse (423123652), we get a palindrome (679444976).

The spelling of 256321324 in words is "two hundred fifty-six million, three hundred twenty-one thousand, three hundred twenty-four".