347218313 has 4 divisors (see below), whose sum is σ = 373927428. Its totient is φ = 320509200.

The previous prime is 347218307. The next prime is 347218343. The reversal of 347218313 is 313812743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313812743 = 13099 ⋅23957.

It can be written as a sum of positive squares in 2 ways, for example, as 186131449 + 161086864 = 13643^2 + 12692^2 .

It is a cyclic number.

It is not a de Polignac number, because 347218313 - 2⁴ = 347218297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 347218313.

It is not an unprimeable number, because it can be changed into a prime (347218303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13354538 + ... + 13354563.

It is an arithmetic number, because the mean of its divisors is an integer number (93481857).

Almost surely, 2^347218313 is an apocalyptic number.

It is an amenable number.

347218313 is a deficient number, since it is larger than the sum of its proper divisors (26709115).

347218313 is a wasteful number, since it uses less digits than its factorization.

347218313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26709114.

The product of its digits is 12096, while the sum is 32.

The square root of 347218313 is about 18633.7949167635. The cubic root of 347218313 is about 702.8579166757.

It can be divided in two parts, 34721 and 8313, that added together give a palindrome (43034).

The spelling of 347218313 in words is "three hundred forty-seven million, two hundred eighteen thousand, three hundred thirteen".