16500173231 has 2 divisors, whose sum is σ = 16500173232. Its totient is φ = 16500173230.

The previous prime is 16500173197. The next prime is 16500173267. The reversal of 16500173231 is 13237100561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16500173231 - 2¹⁴ = 16500156847 is a prime.

It is a super-2 number, since 2×16500173231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16500173194 and 16500173203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16800173231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250086615 + 8250086616.

It is an arithmetic number, because the mean of its divisors is an integer number (8250086616).

Almost surely, 2^16500173231 is an apocalyptic number.

16500173231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16500173231 is an equidigital number, since it uses as much as digits as its factorization.

16500173231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

Adding to 16500173231 its reverse (13237100561), we get a palindrome (29737273792).

The spelling of 16500173231 in words is "sixteen billion, five hundred million, one hundred seventy-three thousand, two hundred thirty-one".