311342143 has 8 divisors (see below), whose sum is σ = 356153888. Its totient is φ = 266613984.

The previous prime is 311342137. The next prime is 311342177. The reversal of 311342143 is 341243113.

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

It is a de Polignac number, because none of the positive numbers 2^k-311342143 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 (311342123) 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, 12696 + ... + 27997.

It is an arithmetic number, because the mean of its divisors is an integer number (44519236).

Almost surely, 2^311342143 is an apocalyptic number.

311342143 is a deficient number, since it is larger than the sum of its proper divisors (44811745).

311342143 is a wasteful number, since it uses less digits than its factorization.

311342143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41793.

The product of its digits is 864, while the sum is 22.

The square root of 311342143 is about 17644.8899968234. The cubic root of 311342143 is about 677.7652582586.

Adding to 311342143 its reverse (341243113), we get a palindrome (652585256).

The spelling of 311342143 in words is "three hundred eleven million, three hundred forty-two thousand, one hundred forty-three".