318303813 has 4 divisors (see below), whose sum is σ = 424405088. Its totient is φ = 212202540.

The previous prime is 318303803. The next prime is 318303829.

318303813 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-318303813 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 (318303803) 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, 53050633 + ... + 53050638.

It is an arithmetic number, because the mean of its divisors is an integer number (106101272).

Almost surely, 2^318303813 is an apocalyptic number.

It is an amenable number.

318303813 is a deficient number, since it is larger than the sum of its proper divisors (106101275).

318303813 is a wasteful number, since it uses less digits than its factorization.

318303813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106101274.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 318303813 is about 17841.0709600069. The cubic root of 318303813 is about 682.7797208418.

The spelling of 318303813 in words is "three hundred eighteen million, three hundred three thousand, eight hundred thirteen".