321042313 has 4 divisors (see below), whose sum is σ = 324649620. Its totient is φ = 317435008.

The previous prime is 321042307. The next prime is 321042317. The reversal of 321042313 is 313240123.

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 81504784 + 239537529 = 9028^2 + 15477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321042313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321042317) 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, 1803520 + ... + 1803697.

It is an arithmetic number, because the mean of its divisors is an integer number (81162405).

Almost surely, 2^321042313 is an apocalyptic number.

It is an amenable number.

321042313 is a deficient number, since it is larger than the sum of its proper divisors (3607307).

321042313 is an equidigital number, since it uses as much as digits as its factorization.

321042313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607306.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 321042313 is about 17917.6536689378. The cubic root of 321042313 is about 684.7322113795.

Adding to 321042313 its reverse (313240123), we get a palindrome (634282436).

The spelling of 321042313 in words is "three hundred twenty-one million, forty-two thousand, three hundred thirteen".