311401343 has 8 divisors (see below), whose sum is σ = 339897600. Its totient is φ = 282936280.

The previous prime is 311401303. The next prime is 311401357. The reversal of 311401343 is 343104113.

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

It is not a de Polignac number, because 311401343 - 2¹⁴ = 311384959 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 (311401303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16346 + ... + 29832.

It is an arithmetic number, because the mean of its divisors is an integer number (42487200).

Almost surely, 2^311401343 is an apocalyptic number.

311401343 is a deficient number, since it is larger than the sum of its proper divisors (28496257).

311401343 is a wasteful number, since it uses less digits than its factorization.

311401343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15597.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 311401343 is about 17646.5674565905. The cubic root of 311401343 is about 677.8082133177.

Adding to 311401343 its reverse (343104113), we get a palindrome (654505456).

The spelling of 311401343 in words is "three hundred eleven million, four hundred one thousand, three hundred forty-three".