311140343 has 6 divisors (see below), whose sum is σ = 325256904. Its totient is φ = 297611996.

The previous prime is 311140339. The next prime is 311140393. The reversal of 311140343 is 343041113.

It is not a de Polignac number, because 311140343 - 2² = 311140339 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 (311140393) 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 5 ways as a sum of consecutive naturals, for example, 293555 + ... + 294612.

It is an arithmetic number, because the mean of its divisors is an integer number (54209484).

Almost surely, 2^311140343 is an apocalyptic number.

311140343 is a deficient number, since it is larger than the sum of its proper divisors (14116561).

311140343 is an equidigital number, since it uses as much as digits as its factorization.

311140343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588213 (or 588190 counting only the distinct ones).

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

The square root of 311140343 is about 17639.1707004609. The cubic root of 311140343 is about 677.6187928205.

Adding to 311140343 its reverse (343041113), we get a palindrome (654181456).

The spelling of 311140343 in words is "three hundred eleven million, one hundred forty thousand, three hundred forty-three".