31431122343373 has 2 divisors, whose sum is σ = 31431122343374. Its totient is φ = 31431122343372.

The previous prime is 31431122343349. The next prime is 31431122343539. The reversal of 31431122343373 is 37334322113413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30727531870564 + 703590472809 = 5543242^2 + 838803^2 .

It is a cyclic number.

It is not a de Polignac number, because 31431122343373 - 2¹³ = 31431122335181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31431122346373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715561171686 + 15715561171687.

It is an arithmetic number, because the mean of its divisors is an integer number (15715561171687).

Almost surely, 2^{31431122343373} is an apocalyptic number.

It is an amenable number.

31431122343373 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431122343373 is an equidigital number, since it uses as much as digits as its factorization.

31431122343373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 40.

Adding to 31431122343373 its reverse (37334322113413), we get a palindrome (68765444456786).

The spelling of 31431122343373 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred twenty-two million, three hundred forty-three thousand, three hundred seventy-three".