313218005 has 8 divisors (see below), whose sum is σ = 377518752. Its totient is φ = 249469648.

The previous prime is 313218001. The next prime is 313218007. The reversal of 313218005 is 500812313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313218005 - 2² = 313218001 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 (313218001) 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, 136847 + ... + 139116.

It is an arithmetic number, because the mean of its divisors is an integer number (47189844).

Almost surely, 2^313218005 is an apocalyptic number.

It is an amenable number.

313218005 is a deficient number, since it is larger than the sum of its proper divisors (64300747).

313218005 is a wasteful number, since it uses less digits than its factorization.

313218005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276195.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 313218005 is about 17697.9661260835. The cubic root of 313218005 is about 679.1237307261.

The spelling of 313218005 in words is "three hundred thirteen million, two hundred eighteen thousand, five".