313121343 has 8 divisors (see below), whose sum is σ = 428778928. Its totient is φ = 203105664.

The previous prime is 313121327. The next prime is 313121407. The reversal of 313121343 is 343121313.

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

It is not a de Polignac number, because 313121343 - 2⁴ = 313121327 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 (313121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1410346 + ... + 1410567.

It is an arithmetic number, because the mean of its divisors is an integer number (53597366).

Almost surely, 2^313121343 is an apocalyptic number.

313121343 is a deficient number, since it is larger than the sum of its proper divisors (115657585).

313121343 is a wasteful number, since it uses less digits than its factorization.

313121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820953.

The product of its digits is 648, while the sum is 21.

The square root of 313121343 is about 17695.2350365854. The cubic root of 313121343 is about 679.0538622308.

Adding to 313121343 its reverse (343121313), we get a palindrome (656242656).

The spelling of 313121343 in words is "three hundred thirteen million, one hundred twenty-one thousand, three hundred forty-three".