311432111 has 2 divisors, whose sum is σ = 311432112. Its totient is φ = 311432110.

The previous prime is 311432083. The next prime is 311432113. The reversal of 311432111 is 111234113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311432111 - 2⁶ = 311432047 is a prime.

It is a Sophie Germain prime.

Together with 311432113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311432111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311432113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155716055 + 155716056.

It is an arithmetic number, because the mean of its divisors is an integer number (155716056).

Almost surely, 2^311432111 is an apocalyptic number.

311432111 is a deficient number, since it is larger than the sum of its proper divisors (1).

311432111 is an equidigital number, since it uses as much as digits as its factorization.

311432111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 311432111 is about 17647.4392193315. The cubic root of 311432111 is about 677.8305361890.

Adding to 311432111 its reverse (111234113), we get a palindrome (422666224).

The spelling of 311432111 in words is "three hundred eleven million, four hundred thirty-two thousand, one hundred eleven".