324256813 has 4 divisors (see below), whose sum is σ = 325006108. Its totient is φ = 323507520.

The previous prime is 324256753. The next prime is 324256819. The reversal of 324256813 is 318652423.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98446084 + 225810729 = 9922^2 + 15027^2 .

It is a cyclic number.

It is not a de Polignac number, because 324256813 - 2⁹ = 324256301 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 (324256819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373998 + ... + 374863.

It is an arithmetic number, because the mean of its divisors is an integer number (81251527).

Almost surely, 2^324256813 is an apocalyptic number.

It is an amenable number.

324256813 is a deficient number, since it is larger than the sum of its proper divisors (749295).

324256813 is an equidigital number, since it uses as much as digits as its factorization.

324256813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749294.

The product of its digits is 34560, while the sum is 34.

The square root of 324256813 is about 18007.1322814045. The cubic root of 324256813 is about 687.0099651992.

The spelling of 324256813 in words is "three hundred twenty-four million, two hundred fifty-six thousand, eight hundred thirteen".