210131235504173 has 2 divisors, whose sum is σ = 210131235504174. Its totient is φ = 210131235504172.

The previous prime is 210131235504137. The next prime is 210131235504181. The reversal of 210131235504173 is 371405532131012.

Together with previous prime (210131235504137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162710892849124 + 47420342655049 = 12755818^2 + 6886243^2 .

It is a cyclic number.

It is not a de Polignac number, because 210131235504173 - 2⁴⁰ = 209031723876397 is a prime.

It is a super-2 number, since 2×210131235504173² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210131235506173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105065617752086 + 105065617752087.

It is an arithmetic number, because the mean of its divisors is an integer number (105065617752087).

Almost surely, 2^{210131235504173} is an apocalyptic number.

It is an amenable number.

210131235504173 is a deficient number, since it is larger than the sum of its proper divisors (1).

210131235504173 is an equidigital number, since it uses as much as digits as its factorization.

210131235504173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

Adding to 210131235504173 its reverse (371405532131012), we get a palindrome (581536767635185).

The spelling of 210131235504173 in words is "two hundred ten trillion, one hundred thirty-one billion, two hundred thirty-five million, five hundred four thousand, one hundred seventy-three".