31103002001173 has 2 divisors, whose sum is σ = 31103002001174. Its totient is φ = 31103002001172.

The previous prime is 31103002001161. The next prime is 31103002001177. The reversal of 31103002001173 is 37110020030113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27328868200804 + 3774133800369 = 5227702^2 + 1942713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31103002001173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103002001177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551501000586 + 15551501000587.

It is an arithmetic number, because the mean of its divisors is an integer number (15551501000587).

Almost surely, 2^{31103002001173} is an apocalyptic number.

It is an amenable number.

31103002001173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103002001173 is an equidigital number, since it uses as much as digits as its factorization.

31103002001173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

Adding to 31103002001173 its reverse (37110020030113), we get a palindrome (68213022031286).

The spelling of 31103002001173 in words is "thirty-one trillion, one hundred three billion, two million, one thousand, one hundred seventy-three".