311342111 has 4 divisors (see below), whose sum is σ = 311518512. Its totient is φ = 311165712.

The previous prime is 311342107. The next prime is 311342123. The reversal of 311342111 is 111243113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311342111 - 2² = 311342107 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 311342111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311342011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85526 + ... + 89091.

It is an arithmetic number, because the mean of its divisors is an integer number (77879628).

Almost surely, 2^311342111 is an apocalyptic number.

311342111 is a deficient number, since it is larger than the sum of its proper divisors (176401).

311342111 is a wasteful number, since it uses less digits than its factorization.

311342111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176400.

The product of its digits is 72, while the sum is 17.

The square root of 311342111 is about 17644.8890900453. The cubic root of 311342111 is about 677.7652350382.

Adding to 311342111 its reverse (111243113), we get a palindrome (422585224).

The spelling of 311342111 in words is "three hundred eleven million, three hundred forty-two thousand, one hundred eleven".