31324316173 has 2 divisors, whose sum is σ = 31324316174. Its totient is φ = 31324316172.

The previous prime is 31324316131. The next prime is 31324316189. The reversal of 31324316173 is 37161342313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17213964804 + 14110351369 = 131202^2 + 118787^2 .

It is a cyclic number.

It is not a de Polignac number, because 31324316173 - 2¹³ = 31324307981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31324316873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662158086 + 15662158087.

It is an arithmetic number, because the mean of its divisors is an integer number (15662158087).

Almost surely, 2^31324316173 is an apocalyptic number.

It is an amenable number.

31324316173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31324316173 is an equidigital number, since it uses as much as digits as its factorization.

31324316173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

Adding to 31324316173 its reverse (37161342313), we get a palindrome (68485658486).

The spelling of 31324316173 in words is "thirty-one billion, three hundred twenty-four million, three hundred sixteen thousand, one hundred seventy-three".