31430231311 has 2 divisors, whose sum is σ = 31430231312. Its totient is φ = 31430231310.

The previous prime is 31430231293. The next prime is 31430231333. The reversal of 31430231311 is 11313203413.

It is an a-pointer prime, because the next prime (31430231333) can be obtained adding 31430231311 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31430231311 - 2⁵ = 31430231279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31430231341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715115655 + 15715115656.

It is an arithmetic number, because the mean of its divisors is an integer number (15715115656).

Almost surely, 2^31430231311 is an apocalyptic number.

31430231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430231311 is an equidigital number, since it uses as much as digits as its factorization.

31430231311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31430231311 its reverse (11313203413), we get a palindrome (42743434724).

The spelling of 31430231311 in words is "thirty-one billion, four hundred thirty million, two hundred thirty-one thousand, three hundred eleven".