31231311322147 has 2 divisors, whose sum is σ = 31231311322148. Its totient is φ = 31231311322146.

The previous prime is 31231311322117. The next prime is 31231311322151. The reversal of 31231311322147 is 74122311313213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31231311322147 - 2¹⁵ = 31231311289379 is a prime.

It is not a weakly prime, because it can be changed into another prime (31231311322117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615655661073 + 15615655661074.

It is an arithmetic number, because the mean of its divisors is an integer number (15615655661074).

Almost surely, 2^{31231311322147} is an apocalyptic number.

31231311322147 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231311322147 is an equidigital number, since it uses as much as digits as its factorization.

31231311322147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The spelling of 31231311322147 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred eleven million, three hundred twenty-two thousand, one hundred forty-seven".